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The European Organization for Nuclear Research, known as CERN (; ; ), is an
intergovernmental organization Globalization is social change associated with increased connectivity among societies and their elements and the explosive evolution of transportation and telecommunication technologies to facilitate international cultural and economic exchange. ...
that operates the largest
particle physics Particle physics or high-energy physics is the study of Elementary particle, fundamental particles and fundamental interaction, forces that constitute matter and radiation. The field also studies combinations of elementary particles up to the s ...
laboratory in the world. Established in 1954, it is based in
Meyrin Meyrin () is a Municipalities of Switzerland, municipality of the Canton of Geneva, Switzerland. The main site of CERN, the European particle physics research organisation, is in Meyrin. Meyrin was originally a small agricultural village until the ...
, western suburb of
Geneva Geneva ( , ; ) ; ; . is the List of cities in Switzerland, second-most populous city in Switzerland and the most populous in French-speaking Romandy. Situated in the southwest of the country, where the Rhône exits Lake Geneva, it is the ca ...
, on the
France–Switzerland border The France–Switzerland border is long. Its current path is mostly the product of the Congress of Vienna of 1815, with the accession of Geneva, Neuchâtel and Valais to the Swiss Confederation, but it has since been modified in detail, the la ...
. It comprises 24 member states. Israel, admitted in 2013, is the only full member geographically out of Europe. CERN is an official
United Nations General Assembly observer The United Nations General Assembly has granted observer status to international organizations, entities, and non-member states, to enable them to participate in the work of the United Nations General Assembly, though with limitations. The General ...
. The acronym CERN is also used to refer to the laboratory; in 2023, it had 2,666 scientific, technical, and administrative staff members, and hosted about 12,370 users from institutions in more than 80 countries. In 2016, CERN generated 49
petabytes The byte is a unit of digital information that most commonly consists of eight bits. Historically, the byte was the number of bits used to encode a single character of text in a computer and for this reason it is the smallest addressable un ...
of data. CERN's main function is to provide the
particle accelerator A particle accelerator is a machine that uses electromagnetic fields to propel electric charge, charged particles to very high speeds and energies to contain them in well-defined particle beam, beams. Small accelerators are used for fundamental ...
s and other infrastructure needed for high-energy physics research – consequently, numerous experiments have been constructed at CERN through international collaborations. CERN is the site of the
Large Hadron Collider The Large Hadron Collider (LHC) is the world's largest and highest-energy particle accelerator. It was built by the CERN, European Organization for Nuclear Research (CERN) between 1998 and 2008, in collaboration with over 10,000 scientists, ...
(LHC), the world's largest and highest-energy particle collider. The main site at
Meyrin Meyrin () is a Municipalities of Switzerland, municipality of the Canton of Geneva, Switzerland. The main site of CERN, the European particle physics research organisation, is in Meyrin. Meyrin was originally a small agricultural village until the ...
hosts a large computing facility, which is primarily used to store and analyze data from experiments, as well as simulate
events Event may refer to: Gatherings of people * Ceremony, an event of ritual significance, performed on a special occasion * Convention (meeting), a gathering of individuals engaged in some common interest * Event management, the organization of eve ...
. As researchers require remote access to these facilities, the lab has historically been a major
wide area network A wide area network (WAN) is a telecommunications network that extends over a large geographic area. Wide area networks are often established with leased telecommunication circuits. Businesses, as well as schools and government entities, use ...
hub. CERN is also the birthplace of the
World Wide Web The World Wide Web (WWW or simply the Web) is an information system that enables Content (media), content sharing over the Internet through user-friendly ways meant to appeal to users beyond Information technology, IT specialists and hobbyis ...
.


History

The convention establishing CERN was ratified on 29 September 1954 by 12 countries in Western Europe. The acronym CERN originally represented the French words for ('European Council for Nuclear Research'), which was a provisional council for building the laboratory, established by 12 European governments in 1952. During these early years, the council worked at the
University of Copenhagen The University of Copenhagen (, KU) is a public university, public research university in Copenhagen, Copenhagen, Denmark. Founded in 1479, the University of Copenhagen is the second-oldest university in Scandinavia, after Uppsala University. ...
under the direction of
Niels Bohr Niels Henrik David Bohr (, ; ; 7 October 1885 – 18 November 1962) was a Danish theoretical physicist who made foundational contributions to understanding atomic structure and old quantum theory, quantum theory, for which he received the No ...
before moving to its present site near Geneva. The acronym was retained for the new laboratory after the provisional council was dissolved, even though the name changed to the current ('European Organization for Nuclear Research') in 1954. According to
Lew Kowarski Lew Kowarski (10 February 1907 – 30 July 1979) was a Russian-French physicist. He was a lesser-known but important contributor to nuclear science. He participated in the British Tube Alloys on early nuclear weapon research. After the war he wor ...
, a former director of CERN, when the name was changed, the abbreviation could have become the awkward OERN, and
Werner Heisenberg Werner Karl Heisenberg (; ; 5 December 1901 – 1 February 1976) was a German theoretical physicist, one of the main pioneers of the theory of quantum mechanics and a principal scientist in the German nuclear program during World War II. He pub ...
said that this could "still be CERN even if the name is ot. CERN's first president was Sir Benjamin Lockspeiser.
Edoardo Amaldi Edoardo Amaldi (5 September 1908 – 5 December 1989) was an Italian physicist. He coined the term "neutrino" in conversations with Enrico Fermi distinguishing it from the heavier "neutron". He has been described as "one of the leading nuclear p ...
was the general secretary of CERN at its early stages when operations were still provisional, and the first Director-General (1954) was
Felix Bloch Felix Bloch (; ; 23 October 1905 – 10 September 1983) was a Swiss-American physicist who shared the 1952 Nobel Prize in Physics with Edward Mills Purcell "for their development of new methods for nuclear magnetic precision measurements and di ...
. The laboratory was originally devoted to the study of
atomic nuclei The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford at the University of Manchester based on the 1909 Geiger–Marsden gold foil experiment. Aft ...
, but was soon applied to higher-energy physics, concerned mainly with the study of interactions between
subatomic particle In physics, a subatomic particle is a particle smaller than an atom. According to the Standard Model of particle physics, a subatomic particle can be either a composite particle, which is composed of other particles (for example, a baryon, lik ...
s. Therefore, the laboratory operated by CERN is commonly referred to as the European laboratory for particle physics (), which better describes the research being performed there.


Founding members

At the sixth session of the CERN Council in Paris from 29 June to 1 July 1953, the convention establishing the organization was signed, subject to ratification, by 12 states. The convention was gradually ratified by the 12 founding Member States: Belgium, Denmark, France, the
Federal Republic of Germany Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen constituent states have a total population of over 84 ...
, Greece, Italy, the Netherlands, Norway, Sweden, Switzerland, the United Kingdom, and
Yugoslavia , common_name = Yugoslavia , life_span = 1918–19921941–1945: World War II in Yugoslavia#Axis invasion and dismemberment of Yugoslavia, Axis occupation , p1 = Kingdom of SerbiaSerbia , flag_p ...
.


Scientific achievements

Several important achievements in particle physics have been made through experiments at CERN. They include: * 1973: The discovery of
neutral current Weak neutral current interactions are one of the ways in which subatomic particles can interact by means of the weak force. These interactions are mediated by the Z boson. The discovery of weak neutral currents was a significant step towa ...
s in the
Gargamelle Gargamelle was a heavy liquid bubble chamber detector in operation at CERN between 1970 and 1979. It was designed to detect neutrinos and antineutrinos, which were produced with a beam from the Proton Synchrotron (PS) between 1970 and 1976, ...
bubble chamber; * 1983: The discovery of
W and Z bosons In particle physics, the W and Z bosons are vector bosons that are together known as the weak bosons or more generally as the intermediate vector bosons. These elementary particles mediate the weak interaction; the respective symbols are , , an ...
in the UA1 and
UA2 experiment The Underground Area 2 (UA2) experiment was a high-energy physics experiment at the Proton-Antiproton Collider (SpS) — a modification of the Super Proton Synchrotron (SPS) — at CERN. The experiment ran from 1981 until 1990, and its main objec ...
s; * 1989: The determination of the number of light
neutrino A neutrino ( ; denoted by the Greek letter ) is an elementary particle that interacts via the weak interaction and gravity. The neutrino is so named because it is electrically neutral and because its rest mass is so small ('' -ino'') that i ...
families at the
Large Electron–Positron Collider The Large Electron–Positron Collider (LEP) was one of the largest particle accelerators ever constructed. It was built at CERN, a multi-national centre for research in nuclear and particle physics near Geneva, Switzerland. LEP collided electr ...
(LEP) operating on the Z boson peak; * 1995: The first creation of
antihydrogen Antihydrogen () is the antimatter counterpart of hydrogen. Whereas the common hydrogen atom is composed of an electron and proton, the antihydrogen atom is made up of a positron and antiproton. Scientists hope that studying antihydrogen may sh ...
atoms in the
PS210 experiment The PS210 experiment was the first experiment that led to the observation of antihydrogen atoms produced at the Low Energy Antiproton Ring (LEAR) at CERN in 1995. The antihydrogen atoms were produced in flight and moved at nearly the speed of lig ...
; * 1995–2005: Precision measurement of the Z lineshape, based predominantly on LEP data collected on the Z resonance from 1990 to 1995; * 1999: The discovery of direct
CP violation In particle physics, CP violation is a violation of CP-symmetry (or charge conjugation parity symmetry): the combination of C-symmetry (charge conjugation symmetry) and P-symmetry ( parity symmetry). CP-symmetry states that the laws of physics s ...
in the
NA48 experiment The NA48 experiment was a series of particle physics experiments in the field of kaon physics being carried out at the North Area of the Super Proton Synchrotron at CERN. The collaboration involved over 100 physicists mostly from Western Europe ...
; * 2000: The Heavy Ion Programme discovered a new state of matter,
quark–gluon plasma Quark–gluon plasma (QGP or quark soup) is an interacting localized assembly of quarks and gluons at Thermodynamic equilibrium#Local and global equilibrium, thermal (local kinetic) and (close to) chemical (abundance) equilibrium. The word ''plasm ...
. * 2010: The isolation of 38 atoms of
antihydrogen Antihydrogen () is the antimatter counterpart of hydrogen. Whereas the common hydrogen atom is composed of an electron and proton, the antihydrogen atom is made up of a positron and antiproton. Scientists hope that studying antihydrogen may sh ...
; * 2011: Maintaining
antihydrogen Antihydrogen () is the antimatter counterpart of hydrogen. Whereas the common hydrogen atom is composed of an electron and proton, the antihydrogen atom is made up of a positron and antiproton. Scientists hope that studying antihydrogen may sh ...
for over 15 minutes; * 2012: A
boson In particle physics, a boson ( ) is a subatomic particle whose spin quantum number has an integer value (0, 1, 2, ...). Bosons form one of the two fundamental classes of subatomic particle, the other being fermions, which have half odd-intege ...
with mass around 125 GeV/c2 consistent with the long-sought
Higgs boson The Higgs boson, sometimes called the Higgs particle, is an elementary particle in the Standard Model of particle physics produced by the excited state, quantum excitation of the Higgs field, one of the field (physics), fields in particl ...
. In September 2011, CERN attracted media attention when the OPERA Collaboration reported the detection of possibly faster-than-light neutrinos. Further tests showed that the results were flawed due to an incorrectly connected
GPS The Global Positioning System (GPS) is a satellite-based hyperbolic navigation system owned by the United States Space Force and operated by Mission Delta 31. It is one of the global navigation satellite systems (GNSS) that provide geol ...
synchronization cable. The 1984
Nobel Prize for Physics The Nobel Prize in Physics () is an annual award given by the Royal Swedish Academy of Sciences for those who have made the most outstanding contributions to mankind in the field of physics. It is one of the five Nobel Prize, Nobel Prizes establi ...
was awarded to
Carlo Rubbia Carlo Rubbia (born 31 March 1934) is an Italian particle physicist and inventor who shared the Nobel Prize in Physics in 1984 with Simon van der Meer for work leading to the discovery of the W and Z particles at CERN. Early life and educatio ...
and Simon van der Meer for the developments that resulted in the discoveries of the W and Z bosons. The 1992 Nobel Prize for Physics was awarded to CERN staff researcher
Georges Charpak Georges Charpak (; born Jerzy Charpak; 1 August 1924 – 29 September 2010) was a Polish-born French physicist who received the Nobel Prize in Physics in 1992 for his invention of the multiwire proportional chamber. Life Georges Charpak was born ...
"for his invention and development of particle detectors, in particular the
multiwire proportional chamber A wire chamber or multi-wire proportional chamber is a type of proportional counter that detects charged particles and photons and can give positional information on their trajectory, by tracking the trails of gaseous ionization. was located via ...
". The 2013 Nobel Prize for Physics was awarded to
François Englert François, Baron Englert (; born 6 November 1932) is a Belgian theoretical physicist and 2013 Nobel Prize laureate. Englert is professor emeritus at the Université libre de Bruxelles (ULB), where he is a member of the Service de Physique Thé ...
and
Peter Higgs Peter Ware Higgs (29 May 1929 – 8 April 2024) was a British theoretical physicist, professor at the University of Edinburgh,Griggs, Jessica (Summer 2008The Missing Piece ''Edit'' the University of Edinburgh Alumni Magazine, p. 17 and Nobel ...
for the theoretical description of the Higgs mechanism in the year after the Higgs boson was found by CERN experiments.


Computer science

CERN pioneered the introduction of
TCP/IP The Internet protocol suite, commonly known as TCP/IP, is a framework for organizing the communication protocols used in the Internet and similar computer networks according to functional criteria. The foundational protocols in the suite are ...
for its
intranet An intranet is a computer network for sharing information, easier communication, collaboration tools, operational systems, and other computing services within an organization, usually to the exclusion of access by outsiders. The term is used in ...
, beginning in 1984. This played an influential role in the adoption of the TCP/IP in Europe (see
History of the Internet The history of the Internet originated in the efforts of scientists and engineers to build and interconnect computer networks. The Internet protocol suite, Internet Protocol Suite, the set of rules used to communicate between networks and devi ...
and Protocol Wars). In 1989, the
World Wide Web The World Wide Web (WWW or simply the Web) is an information system that enables Content (media), content sharing over the Internet through user-friendly ways meant to appeal to users beyond Information technology, IT specialists and hobbyis ...
was invented at CERN by
Tim Berners-Lee Sir Timothy John Berners-Lee (born 8 June 1955), also known as TimBL, is an English computer scientist best known as the inventor of the World Wide Web, the HTML markup language, the URL system, and HTTP. He is a professorial research fellow a ...
. Based on the concept of
hypertext Hypertext is E-text, text displayed on a computer display or other electronic devices with references (hyperlinks) to other text that the reader can immediately access. Hypertext documents are interconnected by hyperlinks, which are typic ...
, the idea was designed to facilitate information sharing between researchers. This stemmed from Berners-Lee's earlier work at CERN on a database named
ENQUIRE ENQUIRE was a software project written in 1980 by Tim Berners-Lee at CERN, which was the predecessor to the World Wide Web. It was a simple hypertext program that had some of the same ideas as the Web and the Semantic Web but was different in s ...
. A colleague,
Robert Cailliau Robert Cailliau (last name pronunciation: ajo born 26 January 1947) is a Belgian informatics engineer who proposed the first (pre-www) hypertext system for CERN in 1987 and collaborated with Tim Berners-Lee on the World Wide Web (jointly winni ...
, became involved in 1990. In 1995, Berners-Lee and Cailliau were jointly honoured by the
Association for Computing Machinery The Association for Computing Machinery (ACM) is a US-based international learned society for computing. It was founded in 1947 and is the world's largest scientific and educational computing society. The ACM is a non-profit professional membe ...
for their contributions to the development of the World Wide Web. A copy of the first webpage, created by Berners-Lee, is still published on the
World Wide Web Consortium The World Wide Web Consortium (W3C) is the main international standards organization for the World Wide Web. Founded in 1994 by Tim Berners-Lee, the consortium is made up of member organizations that maintain full-time staff working together in ...
's website as a historical document. The first website was activated in 1991. On 30 April 1993, CERN announced that the World Wide Web would be free to anyone. It became the dominant way through which most users interact with the
Internet The Internet (or internet) is the Global network, global system of interconnected computer networks that uses the Internet protocol suite (TCP/IP) to communicate between networks and devices. It is a internetworking, network of networks ...
. More recently, CERN has become a facility for the development of
grid computing Grid computing is the use of widely distributed computer resources to reach a common goal. A computing grid can be thought of as a distributed system with non-interactive workloads that involve many files. Grid computing is distinguished fro ...
, hosting projects including the Enabling Grids for E-sciencE (EGEE) and LHC Computing Grid. It also hosts the CERN Internet Exchange Point (CIXP), one of the two main
internet exchange point Internet exchange points (IXes or IXPs) are common grounds of Internet Protocol, IP networking, allowing participant Internet service provider, Internet service providers (ISPs) to exchange data destined for their respective networks. IXPs are ...
s in Switzerland. , CERN employs ten times more engineers and technicians than research physicists.


Particle accelerators


Current complex

CERN operates a network of seven accelerators and two decelerators, and some additional small accelerators. Each machine in the chain increases the energy of particle beams before delivering them to experiments or to the next more powerful accelerator. The decelerators naturally decrease the energy of particle beams before delivering them to experiments or further accelerators/decelerators. Before an experiment is able to use the network of accelerators, it must be approved by the various Scientific Committees of CERN. Currently (as of 2022) active machines are the LHC accelerator and: * The LINAC 3
linear accelerator A linear particle accelerator (often shortened to linac) is a type of particle accelerator that accelerates charged subatomic particles or ions to a high speed by subjecting them to a series of oscillating electric potentials along a linear ...
generating low energy particles. It provides heavy ions at 4.2 MeV/ u for injection into the Low Energy Ion Ring (LEIR). * The
Low Energy Ion Ring The Low Energy Ion Ring (LEIR) is a particle accelerator at CERN used to accelerate ions from the LINAC 3 to the Proton Synchrotron (PS) to provide ions for collisions within the Large Hadron Collider (LHC). History LEIR was converted from a ...
(LEIR) accelerates the ions from the ion linear accelerator LINAC 3, before transferring them to the
Proton Synchrotron The Proton Synchrotron (PS, sometimes also referred to as CPS) is a particle accelerator at CERN. It is CERN's first synchrotron, beginning its operation in 1959. For a brief period the PS was the world's highest energy particle accelerator. It ...
(PS). This accelerator was commissioned in 2005, after having been reconfigured from the previous
Low Energy Antiproton Ring The Low Energy Anti-Proton Ring (LEAR) was a particle accelerator at CERN which operated from 1982 until 1996. The ring was designed to decelerate and store antiprotons, to study the properties of antimatter and to create atoms of antihydrogen. ...
(LEAR). * The Linac4
linear accelerator A linear particle accelerator (often shortened to linac) is a type of particle accelerator that accelerates charged subatomic particles or ions to a high speed by subjecting them to a series of oscillating electric potentials along a linear ...
accelerates negative hydrogen ions to an energy of 160 MeV. The ions are then injected to the Proton Synchrotron Booster (PSB) where both electrons are then stripped from each of the hydrogen ions and thus only the nucleus containing one proton remains. The protons are then used in experiments or accelerated further in other CERN accelerators. Linac4 serves as the source of all proton beams for CERN experiments. * The Proton Synchrotron Booster increases the energy of particles generated by the proton linear accelerator before they are transferred to the other accelerators. * The 28
GeV In physics, an electronvolt (symbol eV), also written electron-volt and electron volt, is the measure of an amount of kinetic energy gained by a single electron accelerating through an electric potential difference of one volt in vacuum. When us ...
Proton Synchrotron The Proton Synchrotron (PS, sometimes also referred to as CPS) is a particle accelerator at CERN. It is CERN's first synchrotron, beginning its operation in 1959. For a brief period the PS was the world's highest energy particle accelerator. It ...
(PS), built during 1954–1959 and still operating as a feeder to the more powerful SPS and to many of CERN's experiments. * The
Super Proton Synchrotron The Super Proton Synchrotron (SPS) is a particle accelerator of the synchrotron type at CERN. It is housed in a circular tunnel, in circumference, straddling the border of France and Switzerland near Geneva, Switzerland. History The SPS was d ...
(SPS), a circular accelerator with a diameter of 2 kilometres built in a tunnel, which started operation in 1976. It was designed to deliver an energy of 300 GeV and was gradually upgraded to 450 GeV. As well as having its own beamlines for fixed-target experiments (currently
COMPASS A compass is a device that shows the cardinal directions used for navigation and geographic orientation. It commonly consists of a magnetized needle or other element, such as a compass card or compass rose, which can pivot to align itself with No ...
and NA62), it has been operated as a
proton A proton is a stable subatomic particle, symbol , Hydron (chemistry), H+, or 1H+ with a positive electric charge of +1 ''e'' (elementary charge). Its mass is slightly less than the mass of a neutron and approximately times the mass of an e ...
antiproton The antiproton, , (pronounced ''p-bar'') is the antiparticle of the proton. Antiprotons are stable, but they are typically short-lived, since any collision with a proton will cause both particles to be annihilated in a burst of energy. The exis ...
collider A collider is a type of particle accelerator that brings two opposing particle beams together such that the particles collide. Compared to other particle accelerators in which the moving particles collide with a stationary matter target, collid ...
(the SpS collider), and for accelerating high energy
electron The electron (, or in nuclear reactions) is a subatomic particle with a negative one elementary charge, elementary electric charge. It is a fundamental particle that comprises the ordinary matter that makes up the universe, along with up qua ...
s and
positron The positron or antielectron is the particle with an electric charge of +1''elementary charge, e'', a Spin (physics), spin of 1/2 (the same as the electron), and the same Electron rest mass, mass as an electron. It is the antiparticle (antimatt ...
s which were injected into the
Large Electron–Positron Collider The Large Electron–Positron Collider (LEP) was one of the largest particle accelerators ever constructed. It was built at CERN, a multi-national centre for research in nuclear and particle physics near Geneva, Switzerland. LEP collided electr ...
(LEP). Since 2008, it has been used to inject protons and
heavy ion High-energy nuclear physics studies the behavior of nuclear matter in energy regimes typical of high-energy physics. The primary focus of this field is the study of heavy-ion collisions, as compared to lighter atoms in other particle accelerator ...
s into the
Large Hadron Collider The Large Hadron Collider (LHC) is the world's largest and highest-energy particle accelerator. It was built by the CERN, European Organization for Nuclear Research (CERN) between 1998 and 2008, in collaboration with over 10,000 scientists, ...
(LHC). * The
On-Line Isotope Mass Separator Iseult ( ), alternatively Isolde ( ) and other spellings, is the name of several characters in the legend of Tristan and Iseult. The most prominent is Iseult the Blonde, or Iseult of Ireland, the wife of Mark of Cornwall and the lover of Trista ...
(ISOLDE), which is used to study unstable nuclei. The radioactive ions are produced by the impact of protons at an energy of 1.0–1.4 GeV from the Proton Synchrotron Booster. It was first commissioned in 1967 and was rebuilt with major upgrades in 1974 and 1992. * The
Antiproton Decelerator The Antiproton Decelerator (AD) is a storage ring at the CERN laboratory near Geneva. It was built from the Antiproton Collector (AC) to be a successor to the Low Energy Antiproton Ring (LEAR) and started operation in the year 2000. Antiprotons ...
(AD), which reduces the velocity of antiprotons to about 10% of the
speed of light The speed of light in vacuum, commonly denoted , is a universal physical constant exactly equal to ). It is exact because, by international agreement, a metre is defined as the length of the path travelled by light in vacuum during a time i ...
for research of
antimatter In modern physics, antimatter is defined as matter composed of the antiparticles (or "partners") of the corresponding subatomic particle, particles in "ordinary" matter, and can be thought of as matter with reversed charge and parity, or go ...
. The AD machine was reconfigured from the previous Antiproton Collector (AC) machine. * The Extra Low Energy Antiproton ring (ELENA), which takes antiprotons from AD and decelerates them into low energies (speeds) for use in antimatter experiments. * The
AWAKE Wakefulness is a daily recurring brain state and state of consciousness in which an individual is conscious and engages in coherent cognitive and behavioral responses to the external world. Being awake is the opposite of being asleep, in which ...
experiment, which is a proof-of-principle plasma wakefield accelerator. * The CERN Linear Electron Accelerator for Research (CLEAR) accelerator research and development facility.


Large Hadron Collider

Many activities at CERN currently involve operating the
Large Hadron Collider The Large Hadron Collider (LHC) is the world's largest and highest-energy particle accelerator. It was built by the CERN, European Organization for Nuclear Research (CERN) between 1998 and 2008, in collaboration with over 10,000 scientists, ...
(LHC) and the experiments for it. The LHC represents a large-scale, worldwide scientific cooperation project. The LHC tunnel is located 100 metres underground, in the region between
Geneva International Airport Geneva Airport – formerly and still unofficially known as Cointrin Airport – is an international airport of Geneva, the second most populous city in Switzerland. It is located northwest of the city centre. It surpassed the 15-million-pas ...
and the nearby
Jura mountains The Jura Mountains ( ) are a sub-alpine mountain range a short distance north of the Western Alps and mainly demarcate a long part of the French–Swiss border. While the Jura range proper (" folded Jura", ) is located in France and Switzerla ...
. The majority of its length is on the French side of the border. It uses the 27 km circumference circular tunnel previously occupied by the
Large Electron–Positron Collider The Large Electron–Positron Collider (LEP) was one of the largest particle accelerators ever constructed. It was built at CERN, a multi-national centre for research in nuclear and particle physics near Geneva, Switzerland. LEP collided electr ...
(LEP), which was shut down in November 2000. CERN's existing PS/SPS accelerator complexes are used to pre-accelerate protons and lead ions which are then injected into the LHC. Eight experiments (
CMS CMS may refer to: Computing * Call management system * CMS-2, a programming language implemented for and used by the United States Navy * Code Morphing Software, a technology used by Transmeta * Collection management system for a museum coll ...
,
ATLAS An atlas is a collection of maps; it is typically a bundle of world map, maps of Earth or of a continent or region of Earth. Advances in astronomy have also resulted in atlases of the celestial sphere or of other planets. Atlases have traditio ...
,
LHCb The LHCb (Large Hadron Collider beauty) experiment is a particle physics detector collecting data at the Large Hadron Collider at CERN. LHCb specializes in the measurements of the parameters of CP violation in the interactions of b- and c-hadro ...
, MoEDAL,
TOTEM A totem (from or ''doodem'') is a spirit being, sacred object, or symbol that serves as an emblem of a group of people, such as a family, clan, lineage (anthropology), lineage, or tribe, such as in the Anishinaabe clan system. While the word ...
, LHCf, FASER and
ALICE Alice may refer to: * Alice (name), most often a feminine given name, but also used as a surname Literature * Alice (''Alice's Adventures in Wonderland''), a character in books by Lewis Carroll * ''Alice'' series, children's and teen books by ...
) are located along the collider; each of them studies particle collisions from a different aspect, and with different technologies. Construction for these experiments required an extraordinary engineering effort. For example, a special crane was rented from Belgium to lower pieces of the CMS detector into its cavern, since each piece weighed nearly 2,000 tons. The first of the approximately 5,000 magnets necessary for construction was lowered down a special shaft at in March 2005. The LHC has begun to generate vast quantities of data, which CERN streams to laboratories around the world for distributed processing, making use of a specialized
grid Grid, The Grid, or GRID may refer to: Space partitioning * Regular grid, a tessellation of space with translational symmetry, typically formed from parallelograms or higher-dimensional analogs ** Grid graph, a graph structure with nodes connec ...
infrastructure, the LHC Computing Grid. In April 2005, a trial successfully streamed 600 MB/s to seven different sites across the world. In August 2008, the initial particle beams were injected into the LHC. The first beam was circulated through the entire LHC on 10 September 2008, but the system failed 10 days later because of a faulty magnet connection, and it was stopped for repairs on 19 September 2008. The LHC resumed operation on 20 November 2009 by successfully circulating two beams, each with an energy of 3.5  teraelectronvolts (TeV). The challenge for the engineers was then to line up the two beams so that they smashed into each other. This is like "firing two needles across the Atlantic and getting them to hit each other" according to Steve Myers, director for accelerators and technology. On 30 March 2010, the LHC successfully collided two proton beams with 3.5 TeV of energy per proton, resulting in a 7 TeV collision energy. This was enough to start the main research program, including the search for the
Higgs boson The Higgs boson, sometimes called the Higgs particle, is an elementary particle in the Standard Model of particle physics produced by the excited state, quantum excitation of the Higgs field, one of the field (physics), fields in particl ...
. When the 7 TeV experimental period ended, the LHC increased to 8 TeV (4 TeV per proton) starting March 2012, and soon began particle collisions at that energy. In July 2012, CERN scientists announced the discovery of a new sub-atomic particle that was later confirmed to be the
Higgs boson The Higgs boson, sometimes called the Higgs particle, is an elementary particle in the Standard Model of particle physics produced by the excited state, quantum excitation of the Higgs field, one of the field (physics), fields in particl ...
. In March 2013, CERN announced that the measurements performed on the newly found particle allowed it to conclude that it was a Higgs boson. In early 2013, the LHC was deactivated for a two-year maintenance period, to strengthen the electrical connections between magnets inside the accelerator and for other upgrades. On 5 April 2015, after two years of maintenance and consolidation, the LHC restarted for a second run. The first ramp to the record-breaking energy of 6.5 TeV was performed on 10 April 2015. In 2016, the design collision rate was exceeded for the first time. A second two-year period of shutdown begun at the end of 2018.


Accelerators under construction

As of October 2019, the construction is on-going to upgrade the LHC's luminosity in a project called High Luminosity LHC (HL–LHC). This project should see the LHC accelerator upgraded by 2026 to an order of magnitude higher luminosity. As part of the HL–LHC upgrade project, also other CERN accelerators and their subsystems are receiving upgrades. Among other work, the LINAC 2 linear accelerator injector was decommissioned and replaced by a new injector accelerator, the LINAC4.


Decommissioned accelerators

* The original linear accelerator
LINAC 1 The CERN Hadron Linacs are linear accelerators that accelerate beams of hadrons from a standstill to be used by the larger circular accelerators at the facility. File:Linac1 facility at CERN.jpg, The first CERN Linac, operating from 1958 unti ...
. Operated 1959–1992. * The LINAC 2 linear accelerator injector. Accelerated protons to 50 
MeV In physics, an electronvolt (symbol eV), also written electron-volt and electron volt, is the measure of an amount of kinetic energy gained by a single electron accelerating through an electric potential difference of one volt in vacuum. When us ...
for injection into the Proton Synchrotron Booster (PSB). Operated 1978–2018. * The 600 MeV
Synchro-Cyclotron A synchrocyclotron is a special type of cyclotron, patented by Edwin McMillan in 1952, in which the frequency of the driving RF electric field is varied to compensate for relativistic effects as the particles' velocity begins to approach the spe ...
(SC) which started operation in 1957 and was shut down in 1991. Was made into a public exhibition in 2012–2013. * The
Intersecting Storage Rings The ISR (standing for "Intersecting Storage Rings") was a particle accelerator at CERN. It was the world's first hadron collider, and ran from 1971 to 1984, with a maximum center of mass energy of 62 GeV. From its initial startup, the collider ...
(ISR), an early collider built from 1966 to 1971 and operated until 1984. * The Super Proton–Antiproton Synchrotron (SpS), operated 1981–1991. A modification of Super Proton Synchrotron (SPS) to operate as a proton-antiproton collider. * The
Large Electron–Positron Collider The Large Electron–Positron Collider (LEP) was one of the largest particle accelerators ever constructed. It was built at CERN, a multi-national centre for research in nuclear and particle physics near Geneva, Switzerland. LEP collided electr ...
(LEP), which operated 1989–2000 and was the largest machine of its kind, housed in a 27 km-long circular tunnel which now houses the
Large Hadron Collider The Large Hadron Collider (LHC) is the world's largest and highest-energy particle accelerator. It was built by the CERN, European Organization for Nuclear Research (CERN) between 1998 and 2008, in collaboration with over 10,000 scientists, ...
. * The LEP Pre-Injector (LPI) accelerator complex, consisting of two accelerators, a linear accelerator called LEP Injector Linac (LIL; itself consisting of two back-to-back linear accelerators called LIL V and LIL W) and a circular accelerator called Electron Positron Accumulator (EPA). The purpose of these accelerators was to inject positron and electron beams into the CERN accelerator complex (more precisely, to the Proton Synchrotron), to be delivered to LEP after many stages of acceleration. Operational 1987–2001; after the shutdown of LEP and the completion of experiments that were directly fed by the LPI, the LPI facility was adapted to be used for the CLIC Test Facility 3 (CTF3). * The
Low Energy Antiproton Ring The Low Energy Anti-Proton Ring (LEAR) was a particle accelerator at CERN which operated from 1982 until 1996. The ring was designed to decelerate and store antiprotons, to study the properties of antimatter and to create atoms of antihydrogen. ...
(LEAR) was commissioned in 1982. LEAR assembled the first pieces of true
antimatter In modern physics, antimatter is defined as matter composed of the antiparticles (or "partners") of the corresponding subatomic particle, particles in "ordinary" matter, and can be thought of as matter with reversed charge and parity, or go ...
, in 1995, consisting of nine atoms of
antihydrogen Antihydrogen () is the antimatter counterpart of hydrogen. Whereas the common hydrogen atom is composed of an electron and proton, the antihydrogen atom is made up of a positron and antiproton. Scientists hope that studying antihydrogen may sh ...
. It was closed in 1996, and superseded by the
Antiproton Decelerator The Antiproton Decelerator (AD) is a storage ring at the CERN laboratory near Geneva. It was built from the Antiproton Collector (AC) to be a successor to the Low Energy Antiproton Ring (LEAR) and started operation in the year 2000. Antiprotons ...
. The LEAR apparatus itself was reconfigured into the
Low Energy Ion Ring The Low Energy Ion Ring (LEIR) is a particle accelerator at CERN used to accelerate ions from the LINAC 3 to the Proton Synchrotron (PS) to provide ions for collisions within the Large Hadron Collider (LHC). History LEIR was converted from a ...
(LEIR) ion booster. * The Antiproton Accumulator (AA), built 1979–1980, operations ended in 1997 and the machine was dismantled. Stored antiprotons produced by the Proton Synchrotron (PS) for use in other experiments and accelerators (for example the ISR, SpS and LEAR). For later half of its working life operated in tandem with Antiproton Collector (AC), to form the Antiproton Accumulation Complex (AAC). * The Antiproton Collector (AC), built 1986–1987, operations ended in 1997 and the machine was converted into the
Antiproton Decelerator The Antiproton Decelerator (AD) is a storage ring at the CERN laboratory near Geneva. It was built from the Antiproton Collector (AC) to be a successor to the Low Energy Antiproton Ring (LEAR) and started operation in the year 2000. Antiprotons ...
(AD), which is the successor machine for
Low Energy Antiproton Ring The Low Energy Anti-Proton Ring (LEAR) was a particle accelerator at CERN which operated from 1982 until 1996. The ring was designed to decelerate and store antiprotons, to study the properties of antimatter and to create atoms of antihydrogen. ...
(LEAR). Operated in tandem with Antiproton Accumulator (AA) and the pair formed the Antiproton Accumulation Complex (AAC), whose purpose was to store antiprotons produced by the Proton Synchrotron (PS) for use in other experiments and accelerators, like the
Low Energy Antiproton Ring The Low Energy Anti-Proton Ring (LEAR) was a particle accelerator at CERN which operated from 1982 until 1996. The ring was designed to decelerate and store antiprotons, to study the properties of antimatter and to create atoms of antihydrogen. ...
(LEAR) and Super Proton–Antiproton Synchrotron (SpS). * The Compact Linear Collider Test Facility 3 (CTF3), which studied feasibility for the future normal conducting linear collider project (the CLIC collider). In operation 2001–2016. One of its beamlines has been converted, from 2017 on, into the new CERN Linear Electron Accelerator for Research (CLEAR) facility.


Possible future accelerators

CERN, in collaboration with groups worldwide, is investigating two main concepts for future accelerators: A linear electron-positron collider with a new acceleration concept to increase the energy ( CLIC) and a larger version of the LHC, a project currently named Future Circular Collider.


Sites

The smaller accelerators are on the main
Meyrin Meyrin () is a Municipalities of Switzerland, municipality of the Canton of Geneva, Switzerland. The main site of CERN, the European particle physics research organisation, is in Meyrin. Meyrin was originally a small agricultural village until the ...
site, also known as the West Area, which was originally built in Switzerland alongside the French border, but has been extended to span the border since 1965. The French side is under Swiss jurisdiction and there is no obvious border within the site, apart from a line of marker stones. The SPS and LEP/LHC tunnels are almost entirely outside the main site, and are mostly buried under French farmland and invisible from the surface. They have surface sites at points around them, either as the location of buildings associated with experiments or other facilities needed to operate the colliders such as
cryogenic In physics, cryogenics is the production and behaviour of materials at very low temperatures. The 13th International Institute of Refrigeration's (IIR) International Congress of Refrigeration (held in Washington, DC in 1971) endorsed a univers ...
plants and access shafts. The experiments are located at the same underground level as the tunnels at these sites. Three of these experimental sites are in France, with ATLAS in Switzerland, and some of the ancillary cryogenic and access sites are in Switzerland. The largest of the experimental sites is the Prévessin site, also known as the North Area, which is the target station for non-collider experiments on the SPS accelerator. Other sites are the ones which were used for the UA1, UA2 and the LEP experiments. The latter are used by LHC experiments. Outside of the LEP and LHC experiments, most are officially named and numbered after the site where they were located. For example, NA32 was an experiment looking at the production of so-called "
charmed ''Charmed'' is an American fantasy drama television series created by Constance M. Burge and produced by Aaron Spelling and his production company Spelling Television, with Brad Kern serving as showrunner. The series was originally broadc ...
" particles and located at the Prévessin (North Area) site. WA22 used the
Big European Bubble Chamber The Big European Bubble Chamber (BEBC) is a large detector formerly used to study particle physics at CERN. The chamber body, a stainless-steel vessel, was filled with 35 cubic metres of superheated liquid hydrogen, liquid deuterium, or a neon-hyd ...
(BEBC) at the Meyrin (West Area) site to examine neutrino interactions. The UA1 and UA2 experiments were considered to be in the Underground Area, i.e. situated underground at sites on the SPS accelerator. Most of the roads on the CERN Meyrin and Prévessin sites are named after famous physicists, such as
Wolfgang Pauli Wolfgang Ernst Pauli ( ; ; 25 April 1900 – 15 December 1958) was an Austrian theoretical physicist and a pioneer of quantum mechanics. In 1945, after having been nominated by Albert Einstein, Pauli received the Nobel Prize in Physics "for the ...
, who pushed for CERN's creation. Other notable names are
Richard Feynman Richard Phillips Feynman (; May 11, 1918 – February 15, 1988) was an American theoretical physicist. He is best known for his work in the path integral formulation of quantum mechanics, the theory of quantum electrodynamics, the physics of t ...
,
Albert Einstein Albert Einstein (14 March 187918 April 1955) was a German-born theoretical physicist who is best known for developing the theory of relativity. Einstein also made important contributions to quantum mechanics. His mass–energy equivalence f ...
, and Bohr.


Participation and funding


Member states and budget

Since its foundation by 12 members in 1954, CERN regularly accepted new members. All new members have remained in the organization continuously since their accession, except Spain and Yugoslavia. Spain first joined CERN in 1961, withdrew in 1969, and rejoined in 1983. Yugoslavia was a founding member of CERN but quit in 1961. Of the 24 members, Israel joined CERN as a full member in January 2014, becoming the first, and currently only, non-Geographically European full member. The budget contributions of member states are computed based on their GDP.


Enlargement

Associate Members, Candidates: * Turkey signed an association agreement on 12 May 2014 and became an associate member on 6 May 2015. * Pakistan signed an association agreement on 19 December 2014 and became an associate member on 31 July 2015. * Cyprus signed an association agreement on 5 October 2012 and became an associate member in the pre-stage to membership on 1 April 2016. * Ukraine signed an association agreement on 3 October 2013. The agreement was ratified on 5 October 2016. * India signed an association agreement on 21 November 2016. The agreement was ratified on 16 January 2017. * Slovenia was approved for admission as an Associate Member state in the pre-stage to membership on 16 December 2016. The agreement was ratified on 4 July 2017. * Lithuania was approved for admission as an Associate Member state on 16 June 2017. The association agreement was signed on 27 June 2017 and ratified on 8 January 2018. * Croatia was approved for admission as an Associate Member state on 28 February 2019. The agreement was ratified on 10 October 2019. * Latvia and CERN signed an associate membership agreement on 14 April 2021. Latvia was formally admitted as an Associate Member on 2 August 2021. * Brazil became the first associate member of the Americas on 13 March 2024, after signing the associate membership agreement in March 2022. * Chile and Ireland were approved as new Associate Member States, subject to completion of the necessary accession and ratification processes in the countries on March 2025.


International relations

Three countries have observer status: * Japan – since 1995 * Russia – since 1993 (suspended as of March 2022) * United States – since 1997 Also observers are the following international organizations: * UNESCO – since 1954 *
European Commission The European Commission (EC) is the primary Executive (government), executive arm of the European Union (EU). It operates as a cabinet government, with a number of European Commissioner, members of the Commission (directorial system, informall ...
– since 1985 *
JINR The Joint Institute for Nuclear Research (JINR, ), in Dubna, Moscow Oblast (110 km north of Moscow), Russia, is an international research center for nuclear sciences, with 5,500 staff members including 1,200 researchers holding over 1,000 ...
– since 2014 (suspended as of March 2022) Non-Member States (with dates of Co-operation Agreements) currently involved in CERN programmes are: CERN also has scientific contacts with the following other countries: International research institutions, such as CERN, can aid in science diplomacy.


Associated institutions

A large number of institutes around the world are associated to CERN through current collaboration agreements and/or historical links. The list below contains organizations represented as observers to the CERN Council, organizations to which CERN is an observer and organizations based on the CERN model: *
European Molecular Biology Laboratory The European Molecular Biology Laboratory (EMBL) is an intergovernmental organization dedicated to molecular biology research and is supported by 29 member states, two prospect member states, and one associate member state. EMBL was created in ...
, organization based on the CERN model *
European Space Research Organisation The European Space Research Organisation (ESRO) was an international organisation founded by 10 European nations with the intention of jointly pursuing scientific research in space. It was founded in 1964. As an organisation ESRO was based on a ...
(since 1975 ESA), organization based on the CERN model *
European Southern Observatory The European Organisation for Astronomical Research in the Southern Hemisphere, commonly referred to as the European Southern Observatory (ESO), is an intergovernmental organization, intergovernmental research organisation made up of 16 m ...
, organization based on the CERN model *
JINR The Joint Institute for Nuclear Research (JINR, ), in Dubna, Moscow Oblast (110 km north of Moscow), Russia, is an international research center for nuclear sciences, with 5,500 staff members including 1,200 researchers holding over 1,000 ...
, observer to CERN Council, CERN is represented in the JINR Council. JINR is currently suspended, due to the CERN Council Resolution of 25 March 2022. *
SESAME Sesame (; ''Sesamum indicum'') is a plant in the genus '' Sesamum'', also called benne. Numerous wild relatives occur in Africa and a smaller number in India. It is widely naturalized in tropical regions around the world and is cultivated for ...
, CERN is an observer to the SESAME Council *
UNESCO The United Nations Educational, Scientific and Cultural Organization (UNESCO ) is a List of specialized agencies of the United Nations, specialized agency of the United Nations (UN) with the aim of promoting world peace and International secur ...
, observer to CERN Council


.cern

.cern is a
top-level domain A top-level domain (TLD) is one of the domain name, domains at the highest level in the hierarchical Domain Name System of the Internet after the root domain. The top-level domain names are installed in the DNS root zone, root zone of the nam ...
for CERN. It was registered on 13 August 2014. On 20 October 2015, CERN moved its main website to https://home.cern.


Open science

The Open Science movement focuses on making scientific research openly accessible and on creating knowledge through open tools and processes.
Open access Open access (OA) is a set of principles and a range of practices through which nominally copyrightable publications are delivered to readers free of access charges or other barriers. With open access strictly defined (according to the 2001 de ...
,
open data Open data are data that are openly accessible, exploitable, editable and shareable by anyone for any purpose. Open data are generally licensed under an open license. The goals of the open data movement are similar to those of other "open(-so ...
,
open source software Open-source software (OSS) is Software, computer software that is released under a Open-source license, license in which the copyright holder grants users the rights to use, study, change, and Software distribution, distribute the software an ...
and hardware, open licenses,
digital preservation In library science, library and archival science, digital preservation is a formal process to ensure that digital information of continuing value remains accessible and usable in the long term. It involves planning, resource allocation, and appli ...
and reproducible research are primary components of open science and areas in which CERN has been working towards since its formation. CERN has developed policies and official documents that enable and promote open science, starting with CERN's founding convention in 1953 which indicated that all its results are to be published or made generally available. Since then, CERN published its open access policy in 2014, which ensures that all publications by CERN authors will be published with
gold open access Open access (OA) is a set of principles and a range of practices through which nominally copyrightable publications are delivered to readers free of access charges or other barriers. With open access strictly defined (according to the 2001 de ...
and most recently an open data policy that was endorsed by the four main LHC collaborations (
ALICE Alice may refer to: * Alice (name), most often a feminine given name, but also used as a surname Literature * Alice (''Alice's Adventures in Wonderland''), a character in books by Lewis Carroll * ''Alice'' series, children's and teen books by ...
,
ATLAS An atlas is a collection of maps; it is typically a bundle of world map, maps of Earth or of a continent or region of Earth. Advances in astronomy have also resulted in atlases of the celestial sphere or of other planets. Atlases have traditio ...
,
CMS CMS may refer to: Computing * Call management system * CMS-2, a programming language implemented for and used by the United States Navy * Code Morphing Software, a technology used by Transmeta * Collection management system for a museum coll ...
and
LHCb The LHCb (Large Hadron Collider beauty) experiment is a particle physics detector collecting data at the Large Hadron Collider at CERN. LHCb specializes in the measurements of the parameters of CP violation in the interactions of b- and c-hadro ...
). The open data policy complements the open access policy, addressing the public release of scientific data collected by LHC experiments after a suitable embargo period. Prior to this open data policy, guidelines for data preservation, access and reuse were implemented by each collaboration individually through their own policies which are updated when necessary. The European Strategy for Particle Physics, a document mandated by the CERN Council that forms the cornerstone of Europe's decision-making for the future of particle physics, was last updated in 2020 and affirmed the organisation's role within the open science landscape by stating: "The particle physics community should work with the relevant authorities to help shape the emerging consensus on open science to be adopted for publicly-funded research, and should then implement a policy of open science for the field". Beyond the policy level, CERN has established a variety of services and tools to enable and guide open science at CERN, and in particle physics more generally. On the publishing side, CERN has initiated and operates a global cooperative project, the
Sponsoring Consortium for Open Access Publishing in Particle Physics The Sponsoring Consortium for Open Access Publishing in Particle Physics (or SCOAP3) is an international collaboration in the high-energy physics community to convert traditional closed access physics journals to open access, freely available for ...
, SCOAP3, to convert scientific articles in high-energy physics to open access. In 2018, the SCOAP3 partnership represented 3,000+ libraries from 44 countries and 3 intergovernmental organizations who have worked collectively to convert research articles in high-energy physics across 11 leading journals in the discipline to open access. Public-facing results can be served by various CERN-based services depending on their use case: th
CERN Open Data portal
Zenodo Zenodo is a general-purpose open repository developed under the European OpenAIRE program and operated by CERN. It allows researchers to deposit research papers, data sets, research software, reports, and any other research related digital art ...
, th
CERN Document Server
INSPIRE Inspiration, inspire, INSPIRE, or inspired commonly refers to: * Artistic inspiration, sudden creativity in artistic production * Biblical inspiration, a Christian doctrine on the origin of the Bible * Inhalation, breathing in Inspiration and rel ...
an
HEPData
are the core services used by the researchers and community at CERN, as well as the wider high-energy physics community for the publication of their documents, data, software, multimedia, etc. CERN's efforts towards preservation and reproducible research are best represented by a suite of services addressing the entire physics analysis lifecycle, such as data, software and computing environment
CERN Analysis Preservation
helps researchers to preserve and document the various components of their physics analyses
REANA
(Reusable Analyses) enables the instantiating of preserved research data analyses on the cloud. All services are built using
open source software Open-source software (OSS) is Software, computer software that is released under a Open-source license, license in which the copyright holder grants users the rights to use, study, change, and Software distribution, distribute the software an ...
and strive towards compliance with best effort principles, such as the
FAIR principles FAIR data is data which meets the FAIR principles of findability, accessibility, interoperability, and reusability (FAIR). The acronym and principles were defined in a March 2016 paper in the journal '' Scientific Data'' by a consortium of scie ...
, the FORCE11 guidelines and
Plan S Plan S is an initiative for open-access science publishing launched in 2018 by "cOAlition S", a consortium of national research agencies and funders from twelve European countries. The plan requires scientists and researchers who benefit from ...
, while taking into account relevant activities carried out by the
European Commission The European Commission (EC) is the primary Executive (government), executive arm of the European Union (EU). It operates as a cabinet government, with a number of European Commissioner, members of the Commission (directorial system, informall ...
.


Public exhibits

The CERN Science Gateway, opened in October 2023, is CERN's latest facility for science outreach and education. It is home to a range of immersive exhibits, workshops, and shows.
The Globe of Science and Innovation The Globe of Science and Innovation is a visitor center, designed to inform visitors about the significant research being carried out at CERN. The wooden structure, which is high and in diameter, is a symbol of planet earth and was originally bu ...
, which opened in late 2005, is open to the public. It is used four times a week for special exhibits. The Microcosm museum previously hosted another on-site exhibition on
particle physics Particle physics or high-energy physics is the study of Elementary particle, fundamental particles and fundamental interaction, forces that constitute matter and radiation. The field also studies combinations of elementary particles up to the s ...
and CERN history. It closed permanently on 18 September 2022, in preparation for the installation of the exhibitions in Science Gateway. CERN also provides daily tours to certain facilities such as the Synchro-cyclotron (CERNs first particle accelerator) and the superconducting magnet workshop. In 2004, a two-metre statue of the
Nataraja Nataraja (/ n̪əʈəɾɑd͡ʒᵊ/ ,, ; , ''Naṭarājar'' Telugu: నటరాజు,''Naṭarāju''), also known as Adalvallan (), is a depiction of Shiva, one of the main deities in Hinduism, as the divine cosmic dancer. His dance is ca ...
, the dancing form of the Hindu god
Shiva Shiva (; , ), also known as Mahadeva (; , , Help:IPA/Sanskrit, ɐɦaːd̪eːʋɐh and Hara, is one of the Hindu deities, principal deities of Hinduism. He is the God in Hinduism, Supreme Being in Shaivism, one of the major traditions w ...
, was unveiled at CERN. The statue, symbolizing Shiva's cosmic dance of creation and destruction, was presented by the
Indian government The Government of India (ISO: Bhārata Sarakāra, legally the Union Government or Union of India or the Central Government) is the national authority of the Republic of India, located in South Asia, consisting of 36 states and union territor ...
to celebrate the research center's long association with India. A special plaque next to the statue explains the metaphor of Shiva's cosmic dance with quotations from physicist
Fritjof Capra Fritjof Capra (born February 1, 1939) is an Austrian-born American author, physicist, systems theorist and deep ecologist. In 1995, he became a founding director of the Center for Ecoliteracy in Berkeley, California. He was on the faculty of ...
:
Hundreds of years ago, Indian artists created visual images of dancing Shivas in a beautiful series of bronzes. In our time, physicists have used the most advanced technology to portray the patterns of the cosmic dance. The metaphor of the cosmic dance thus unifies ancient mythology, religious art and modern physics.


Arts at CERN

CERN launched its Cultural Policy for engaging with the arts in 2011. The initiative provided the essential framework and foundations for establishin
Arts at CERN
the arts programme of the Laboratory. Since 2012, Arts at CERN has fostered creative dialogue between art and physics through residencies, art commissions, exhibitions and events. Artists across all creative disciplines have been invited to CERN to experience how fundamental science pursues the big questions about our universe. Even before the arts programme officially started, several highly regarded artists visited the laboratory, drawn to physics and fundamental science. In 1972, James Lee Byars was the first artist to visit the laboratory and the only one, so far, to feature on the cover of the CERN Courier.
Mariko Mori is a Japanese multidisciplinary artist. She is known for her photographs and videos of her hybridized future self, often presented in various guises and featuring traditional Japanese motifs. Her work often explores themes of technology, spiritu ...
, ,
Cerith Wyn Evans Cerith Wyn Evans (born 1958 in Llanelli) is a Welsh conceptual artist, sculptor and film-maker. In 2018 he won the £30,000 Hepworth Prize for Sculpture. Early life and education The son of Sulwyn and Myfanwy Evans, Evans was born in Llanelli. ...
,
John Berger John Peter Berger ( ; 5 November 1926 – 2 January 2017) was an English art critic, novelist, painter and poet. His novel '' G.'' won the 1972 Booker Prize, and his essay on art criticism '' Ways of Seeing'', written as an accompaniment to t ...
and
Anselm Kiefer Anselm Kiefer (born 8 March 1945) is a German painter and sculptor. He studied with Peter Dreher and Horst Antes at the end of the 1960s. His works incorporate materials such as straw, ash, clay, lead, and shellac. The poems of Paul Celan h ...
are among the artists who came to CERN in the years that followed. The programmes of Arts at CERN are structured according to their values and vision to create bridges between cultures. Each programme is designed and formed in collaboration with cultural institutions, other partner laboratories, countries, cities and artistic communities eager to connect with CERN's research, support their activities, and contribute to a global network of art and science. They comprise research-led artistic residencies that take place on-site or remotely. More than 200 artists from 80 countries have participated in the residencies to expand their creative practices at the Laboratory, benefiting from the involvement of 400 physicists, engineers and CERN staff. Between 500 and 800 applications are received every year. The programmes comprise Collide, the international residency programme organised in partnership with a city; Connect, a programme of residencies to foster experimentation in art and science at CERN and in scientific organisations worldwide in collaboration with Pro Helvetia, and Guest Artists, a short stay for artists to stay to engage with CERN's research and community.


In popular culture

* The band
Les Horribles Cernettes ''Les Horribles Cernettes'' (, "The Horrible CERN Girls") was an all-female parody pop group, self-labelled "the one and only High Energy Rock Band", which was founded by employees of CERN and performed at CERN and other HEP-related events. Thei ...
was founded by women from CERN. The name was chosen so to have the same initials as the LHC. * The science journalist Katherine McAlpine made a rap video called "Large Hadron Rap" about CERN's Large Hadron Collider with some of the facility's staff. * ''
Particle Fever ''Particle Fever'' is a 2013 American documentary film tracking the first round of experiments at the Large Hadron Collider (LHC) near Geneva, Switzerland. The film follows the Experimental physics, experimental physicists at the European Organiz ...
'', a 2013 documentary, explores CERN throughout the inside and depicts the events surrounding the 2012 discovery of the
Higgs Boson The Higgs boson, sometimes called the Higgs particle, is an elementary particle in the Standard Model of particle physics produced by the excited state, quantum excitation of the Higgs field, one of the field (physics), fields in particl ...
. *
John Titor John Titor and TimeTravel_0 are pseudonyms used in communications and on internet forums between 1998 and 2001 by an individual claiming to be an American military time traveler from the year 2036. His posts discussed various aspects of time tra ...
, a self-proclaimed
time travel Time travel is the hypothetical activity of traveling into the past or future. Time travel is a concept in philosophy and fiction, particularly science fiction. In fiction, time travel is typically achieved through the use of a device known a ...
er, alleged that CERN would invent time travel in 2001. * CERN is depicted in the
visual novel A visual novel (VN) is a form of digital interactive fiction. Visual novels are often associated with the medium of video games, but are not always labeled as such themselves. They combine a textual narrative with static or animated illustratio ...
/
anime is a Traditional animation, hand-drawn and computer animation, computer-generated animation originating from Japan. Outside Japan and in English, ''anime'' refers specifically to animation produced in Japan. However, , in Japan and in Ja ...
series ''
Steins;Gate ''Steins;Gate'' is a 2009 science fiction visual novel game developed by 5pb. and Nitroplus. It is the second game in the ''Science Adventure'' series, following ''Chaos;Head''. The story follows a group of students as they discover and develop ...
'' as SERN, a shadowy organization that has been researching time travel in order to restructure and control the world. * In Robert J. Sawyer's 1999 science fiction novel ''
Flashforward A flashforward (also spelled flash-forward, and more formally known as prolepsis) is a scene that temporarily takes the narrative forward in time from the current point of the story in literature, film, television and other media. Flashforwards a ...
'', as CERN's Large Hadron Collider accelerator is performing a run to search for the Higgs boson the entire human race sees themselves twenty-one years and six months in the future. * A number of
conspiracy theories A conspiracy theory is an explanation for an event or situation that asserts the existence of a conspiracy (generally by powerful sinister groups, often political in motivation), when other explanations are more probable.Additional sources: * ...
feature CERN, accusing the organization of partaking in occult rituals and secret experiments involving opening portals into
Hell In religion and folklore, hell is a location or state in the afterlife in which souls are subjected to punishment after death. Religions with a linear divine history sometimes depict hells as eternal destinations, such as Christianity and I ...
or other
dimension In physics and mathematics, the dimension of a mathematical space (or object) is informally defined as the minimum number of coordinates needed to specify any point within it. Thus, a line has a dimension of one (1D) because only one coo ...
s, shifting the world into an alternative timeline and causing earthquakes. * In
Dan Brown Daniel Gerhard Brown (born June 22, 1964) is an American author best known for his Thriller (genre), thriller novels, including the Robert Langdon (book series), Robert Langdon novels ''Angels & Demons'' (2000), ''The Da Vinci Code'' (2003), '' ...
's 2000 mystery-thriller novel ''
Angels & Demons ''Angels & Demons'' is a 2000 bestselling mystery- thriller novel written by American author Dan Brown and published by Pocket Books and then by Corgi Books. The novel introduces the character Robert Langdon, who recurs as the protagonist of ...
'' and 2009 film of the same name, a canister of antimatter is stolen from CERN. * CERN is depicted in a 2009 episode of ''
South Park ''South Park'' is an American animated sitcom created by Trey Parker and Matt Stone, and developed by Brian Graden for Comedy Central. The series revolves around four boysStan Marsh, Kyle Broflovski, Eric Cartman, and Kenny McCormickand the ...
'' (Season 13, Episode 6), "
Pinewood Derby The Pinewood Derby is the wood car racing event of the Cub Scout Program of the Scouting America. Pinewood derbies are often run by packs of the Cub Scouts program. With the help of adults, Cub Scouts build their own unpowered, unmanned minia ...
". Randy Marsh, the father of one of the main characters, breaks into the "Hadron Particle Super Collider in Switzerland" and steals a "superconducting bending magnet created for use in tests with particle acceleration" to use in his son Stan's Pinewood Derby racer. * In the 2010 season 3 episode 15 of the TV situation comedy ''
The Big Bang Theory ''The Big Bang Theory'' is an American television sitcom created by Chuck Lorre and Bill Prady for CBS. It aired from September 24, 2007, to May 16, 2019, running for 12 seasons and 279 episodes. The show originally centered on five charact ...
'', "The Large Hadron Collision",
Leonard Leonard or ''Leo'' is a common English language, English masculine given name and a surname. The given name and surname originate from the Old High German ''Leonhard'' containing the prefix ''levon'' ("lion") from the Greek wikt:Λέων#Greek, Λ ...
and Raj travel to CERN to attend a conference and see the LHC. * The 2012 student film ''
Decay Decay may refer to: Science and technology * Bit decay, in computing * Decay time (fall time), in electronics * Distance decay, in geography * Software decay, in computing Biology * Decomposition of organic matter * Mitochondrial decay, in g ...
'', which centres on the idea of the Large Hadron Collider transforming people into zombies, was filmed on location in CERN's maintenance tunnels. * The Compact Muon Solenoid at CERN was used as the basis for the
Megadeth Megadeth is an American thrash metal band formed in Los Angeles in 1983 by vocalist and guitarist Dave Mustaine. Known for their technically complex guitar work and musicianship, Megadeth is one of the "big four" of American thrash metal—alo ...
's ''Super Collider'' album cover. * CERN forms part of the
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of the massively multiplayer
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game '' Ingress'', and in the 2018 Japanese anime television series '' Ingress: The Animation'', based on Niantic's augmented reality mobile game of the same name. * In 2015, Sarah Charley, US communications manager for LHC experiments at CERN with graduate students Jesse Heilman of the
University of California, Riverside The University of California, Riverside (UCR or UC Riverside) is a public university, public Land-grant university, land-grant research university in Riverside, California, United States. It is one of the ten campuses of the University of Cali ...
, and Tom Perry and Laser Seymour Kaplan of the
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created a parody video based on " Collide", a song by American artist
Howie Day Howard Kern Day (born January 15, 1981) is an American singer-songwriter. Beginning his career as a solo artist in the late 1990s, Day became known for his extensive touring and in-concert use of sampler (musical instrument), samplers and effect ...
. The lyrics were changed to be from the perspective of a proton in the Large Hadron Collider. After seeing the parody, Day re-recorded the song with the new lyrics, and released a new version of "Collide" in February 2017 with a video created during his visit to CERN. * In 2015,
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created an art installation called "Supersymmetry" based on his experience as a resident artist at CERN. * In the 2017 season 10 episode 6 of the British science fiction ''
Doctor Who ''Doctor Who'' is a British science fiction television series broadcast by the BBC since 1963. The series, created by Sydney Newman, C. E. Webber and Donald Wilson (writer and producer), Donald Wilson, depicts the adventures of an extraterre ...
'', "Extremis", CERN is one of several locations found to be connected by a hub of mysterious portals. * The television series ''
Mr. Robot ''Mr. Robot'' is an American drama thriller television series created by Sam Esmail for USA Network. It stars Rami Malek as Elliot Alderson, a cybersecurity engineer and hacker with social anxiety disorder, clinical depression, and dissoci ...
'' features a secretive, underground project apparatus that resembles the
ATLAS experiment ATLAS is the largest general-purpose particle detector experiment at the Large Hadron Collider (LHC), a particle accelerator at CERN (the European Organization for Nuclear Research) in Switzerland. The experiment is designed to take advantage of ...
. * '' Parallels'', a
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television series released in March 2022, includes a particle-physics laboratory at the French-Swiss border called "ERN". Various accelerators and facilities at CERN are referenced during the show, including ATLAS, CMS, the Antiproton Decelerator, and the FCC.


See also

* CERN openlab *
Scientific Linux Scientific Linux (SL) is a discontinued Linux distribution produced by Fermilab, CERN, DESY and by ETH Zurich. It is a Free and open-source software, free and open-source operating system based on Red Hat Enterprise Linux. This product is derive ...
, CERN operating system International: *
Fermilab Fermi National Accelerator Laboratory (Fermilab), located in Batavia, Illinois, near Chicago, is a United States Department of Energy United States Department of Energy National Labs, national laboratory specializing in high-energy particle phys ...
, Illinois *
Deep Underground Neutrino Experiment The Deep Underground Neutrino Experiment (DUNE) is a neutrino experiment under construction, with a near detector at Fermilab and a far detector at the Sanford Underground Research Facility that will observe neutrinos produced at Fermilab. An int ...
, South Dakota * Hyper-Kamiokande, neutrino detection experiment, Japan *
Science and Technology Facilities Council The Science and Technology Facilities Council (STFC) is a United Kingdom government agency that carries out research in science and engineering, and funds UK research in areas including particle physics, nuclear physics, space science and astr ...
, UK *
Joint Institute for Nuclear Research The Joint Institute for Nuclear Research (JINR, ), in Dubna, Moscow Oblast (110 km north of Moscow), Russia, is an international research center for nuclear sciences, with 5,500 staff members including 1,200 researchers holding over 1,000 ...
, Russia *
SLAC National Accelerator Laboratory SLAC National Accelerator Laboratory, originally named the Stanford Linear Accelerator Center, is a Federally funded research and development centers, federally funded research and development center in Menlo Park, California, Menlo Park, Ca ...
, California General: *
Science and technology in Switzerland Science and technology in Switzerland play an important role in the Swiss economy, which has very few natural resources that are available in the country. The Swiss National Science Foundation, mandated by the Federal government, is the most ...
*
Science diplomacy Science diplomacy describes how scientific exchanges and the cross-border collaboration of scientists or scientific organizations can perform diplomatic functions in the context of international relations. Most often this diplomacy happens as part o ...


References


External links

*
"The emerald city – CERN at 50"
by ''The Economist''
''CERN Courier'' – International journal of high-energy physics

''Big Bang Day: The Making of CERN''
September 2008, a BBC Radio program


Archival collections


CERN reports, 1952–1993, Niels Bohr Library & Archives
{{Authority control France–Switzerland border International organizations based in Europe International research institutes Meyrin Nuclear research institutes Organisations based in Geneva Particle physics facilities Physics research institutes Research institutes in France Research institutes in Switzerland Science and technology in Europe Science diplomacy Scientific organizations established in 1954