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The Alpha Magnetic Spectrometer, also designated AMS-02, is a particle physics experiment module that is mounted on the International Space Station (ISS). The module is a detector that measures antimatter in cosmic rays, this information is needed to understand the formation of the Universe
Universe
and search for evidence of dark matter. The principal investigator is Nobel laureate
Nobel laureate
particle physicist Samuel Ting. The launch of Space Shuttle
Space Shuttle
Endeavour flight STS-134
STS-134
carrying AMS-02 took place on 16 May 2011, and the spectrometer was installed on 19 May 2011.[4][5] By April 15, 2015, AMS-02 had recorded over 60 billion cosmic ray events[6] and 90 billion after five years of operation since its installation in May 2011.[7] In March 2013, at a seminar at CERN, Professor Samuel Ting
Samuel Ting
reported that AMS had observed over 400,000 positrons, with the positron to electron fraction increasing from 10 GeV to 250 GeV. (Later results have shown a decrease in positron fraction at energies over about 275 GeV). There was "no significant variation over time, or any preferred incoming direction. These results are consistent with the positrons originating from the annihilation of dark matter particles in space, but not yet sufficiently conclusive to rule out other explanations." The results have been published in Physical Review Letters.[8] Additional data are still being collected.[8][9][10][11][12][13][14]

Contents

1 History

1.1 AMS-01 1.2 AMS-02

2 Installation on the International Space Station 3 Specifications 4 Design 5 Scientific goals

5.1 Antimatter 5.2 Dark matter 5.3 Strangelets 5.4 Space radiation environment

6 Results 7 See also 8 References 9 Further reading 10 External links

History[edit] The alpha magnetic spectrometer was proposed in 1995 by MIT particle physicist Samuel Ting, not long after the cancellation of the Superconducting Super Collider. The proposal was accepted and Ting became the principal investigator.[15] AMS-01[edit]

AMS-01 flew in space in June 1998 aboard the Space Shuttle
Space Shuttle
Discovery on STS-91. It is visible near the rear of the payload bay.

A detail view of the AMS-01 module (center) mounted in the shuttle payload bay for the STS-91
STS-91
mission.

An AMS prototype designated AMS-01, a simplified version of the detector, was built by the international consortium under Ting's direction and flown into space aboard the Space Shuttle
Space Shuttle
Discovery on STS-91
STS-91
in June 1998. By not detecting any antihelium the AMS-01 established an upper limit of 1.1×10−6 for the antihelium to helium flux ratio[16] and proved that the detector concept worked in space. This shuttle mission was the last shuttle flight to the Mir
Mir
Space Station.

AMS-02[edit]

AMS-02 during integration and testing at CERN
CERN
near Geneva.

After the flight of the prototype, Ting began the development of a full research system designated AMS-02. This development effort involved the work of 500 scientists from 56 institutions and 16 countries organized under United States Department of Energy
United States Department of Energy
(DOE) sponsorship. The instrument which eventually resulted from a long evolutionary process has been called "the most sophisticated particle detector ever sent into space", rivaling very large detectors used at major particle accelerators, and has cost four times as much as any of its ground-based counterparts. Its goals have also evolved and been refined over time. As it is built as a more comprehensive detector, which has a better chance of discovering evidence of dark matter along other goals.[17] The power requirements for AMS-02 were thought to be too great for a practical independent spacecraft. So AMS-02 was designed to be installed as an external module on the International Space Station
International Space Station
and use power from the ISS. The post- Space Shuttle
Space Shuttle
Columbia plan was to deliver AMS-02 to the ISS
ISS
by space shuttle in 2005 on station assembly mission UF4.1, but technical difficulties and shuttle scheduling issues added more delays.[18] AMS-02 successfully completed final integration and operational testing at CERN
CERN
in Geneva, Switzerland
Geneva, Switzerland
which included exposure to energetic proton beams generated by the CERN
CERN
SPS particle accelerator.[19][20] AMS-02 was then shipped by specialist haulier to ESA's European Space Research and Technology Centre
European Space Research and Technology Centre
(ESTEC) facility in the Netherlands
Netherlands
where it arrived 16 February 2010. Here it underwent thermal vacuum, electromagnetic compatibility and electromagnetic interference testing. AMS-02 was scheduled for delivery to the Kennedy Space Center
Kennedy Space Center
in Florida, United States. in late May 2010.[4] This was however postponed to August 26, as AMS-02 underwent final alignment beam testing at CERN.[21][22]

AMS-02 during final alignment testing at CERN
CERN
just days before being airlifted to Cape Canaveral.

Beamline from SPS feeding 20 GeV positrons to AMS for alignment testing at the time of the picture.

A cryogenic, superconducting magnet system was developed for the AMS-02. With Obama administration
Obama administration
plans to extend International Space Station operations beyond 2015, the decision was made by AMS management to exchange the AMS-02 superconducting magnet for the non-superconducting magnet previously flown on AMS-01. Although the non-superconducting magnet has a weaker field strength, its on-orbit operational time at ISS
ISS
is expected to be 10 to 18 years versus only three years for the superconducting version.[23] In January 2014 it was announced that funding for the ISS
ISS
had been extended until 2024.[24] In 1999, after the successful flight of AMS-01, the total cost of the AMS program was estimated to be $33 million, with AMS-02 planned for flight to the ISS
ISS
in 2003.[25] After the Space Shuttle
Space Shuttle
Columbia disaster in 2003, and after a number of technical difficulties with the construction of AMS-02, the cost of the program ballooned to an estimated $2 billion.[26][27] Installation on the International Space Station[edit]

A computer generated image showing AMS-02 mounted to the ISS
ISS
S3 Upper Inboard Payload Attach Site.

Location of the AMS on the International Space Station
International Space Station
(upper left).

AMS-02 installed on the ISS.

For several years it was uncertain if AMS-02 would ever be launched because it was not manifested to fly on any of the remaining Space Shuttle flights.[28] After the 2003 Columbia disaster NASA
NASA
decided to reduce shuttle flights and retire the remaining shuttles by 2010. A number of flights were removed from the remaining manifest including the flight for AMS-02.[15] In 2006 NASA
NASA
studied alternative ways of delivering AMS-02 to the space station, but they all proved to be too expensive.[28] In May 2008 a bill[29] was proposed to launch AMS-02 to ISS
ISS
on an additional shuttle flight in 2010 or 2011.[30] The bill was passed by the full House of Representatives on 11 June 2008.[31] The bill then went before the Senate Commerce, Science and Transportation Committee where it also passed. It was then amended and passed by the full Senate on 25 September 2008, and was passed again by the House on 27 September 2008.[32] It was signed by President George W. Bush
George W. Bush
on 15 October 2008.[33][34] The bill authorized NASA
NASA
to add another space shuttle flight to the schedule before the space shuttle program was discontinued. In January 2009 NASA
NASA
restored AMS-02 to the shuttle manifest. On 26 August 2010, AMS-02 was delivered from CERN
CERN
to the Kennedy Space Center
Kennedy Space Center
by a Lockheed C-5 Galaxy.[35] It was delivered to the International Space Station
International Space Station
on May 19, 2011 as part of station assembly flight ULF6 on shuttle flight STS-134, commanded by Mark Kelly.[36] It was removed from the shuttle cargo bay using the shuttle's robotic arm and handed off to the station's robotic arm for installation. AMS-02 is mounted on top of the Integrated Truss Structure, on USS-02, the zenith side of the S3-element of the truss.[37] Specifications[edit]

Mass: 8,500 kg Power: 2,500 W Internal data rate: 7 Gbit/s Data rate to ground: 2 Mbit/s (typical, average)[38] Primary mission duration: 10 to 18 years Magnetic field intensity: 0.15 teslas produced by a 1,200 kg permanent neodymium magnet[38] Original superconducting magnet: 2 coils of niobium-titanium at 1.8 K producing a central field of 0.87 teslas[39] AMS-02 flight magnet changed to non-superconducting AMS-01 version to extend experiment life and to solve reliability problems in the operation of the superconducting system

About 1,000 cosmic rays are recorded by the instrument per second, generating about one GB/sec of data. This data is filtered and compressed to about 300 kB/sec for download to the operation center POCC at CERN. Design[edit] The detector module consists of a series of detectors that are used to determine various characteristics of the radiation and particles as they pass through. Characteristics are determined only for particles that pass through from top to bottom. Particles that enter the detector at any other angles are rejected. From top to bottom the subsystems are identified as:[40]

Transition radiation detector measures the velocities of the highest energy particles; Upper time of flight counter, along with the lower time of flight counter, measures the velocities of lower energy particles; Star tracker determines the orientation of the module in space; Silicon tracker measures the coordinates of charged particles in the magnetic field; Permanent magnet bends the path of charged particles so they can be identified; Anti-coincidence counter rejects stray particles that enter through the sides; Ring imaging Cherenkov detector
Ring imaging Cherenkov detector
measures velocity of fast particles with extreme accuracy; Electromagnetic calorimeter measures the total energy of the particles.

Scientific goals[edit] The AMS-02 will use the unique environment of space to advance knowledge of the Universe
Universe
and lead to the understanding of its origin by searching for antimatter, dark matter and measuring cosmic rays.[37] Antimatter[edit] See also: Antimatter Experimental evidence indicates that our galaxy is made of matter; however, scientists believe there are about 100–200 billion galaxies in the Universe
Universe
and some versions of the Big Bang
Big Bang
theory of the origin of the Universe
Universe
require equal amounts of matter and antimatter. Theories that explain this apparent asymmetry violate other measurements. Whether or not there is significant antimatter is one of the fundamental questions of the origin and nature of the Universe. Any observations of an antihelium nucleus would provide evidence for the existence of antimatter in space. In 1999, AMS-01 established a new upper limit of 10−6 for the antihelium/helium flux ratio in the Universe. AMS-02 will search with a sensitivity of 10−9, an improvement of three orders of magnitude over AMS-01, sufficient to reach the edge of the expanding Universe
Universe
and resolve the issue definitively. Dark matter[edit] See also: Dark matter The visible matter in the Universe, such as stars, adds up to less than 5 percent of the total mass that is known to exist from many other observations. The other 95 percent is dark, either dark matter, which is estimated at 20 percent of the Universe
Universe
by weight, or dark energy, which makes up the balance. The exact nature of both still is unknown. One of the leading candidates for dark matter is the neutralino. If neutralinos exist, they should be colliding with each other and giving off an excess of charged particles that can be detected by AMS-02. Any peaks in the background positron, antiproton, or gamma ray flux could signal the presence of neutralinos or other dark matter candidates, but would need to be distinguished from poorly known confounding astrophysical signals. Strangelets[edit] See also: Strangelet Six types of quarks (up, down, strange, charm, bottom and top) have been found experimentally; however, the majority of matter on Earth is made up of only up and down quarks. It is a fundamental question whether there exists stable matter made up of strange quarks in combination with up and down quarks. Particles of such matter are known as strangelets. Strangelets might have extremely large mass and very small charge-to-mass ratios. It would be a totally new form of matter. AMS-02 may determine whether this extraordinary matter exists in our local environment. Space radiation environment[edit] Cosmic radiation during transit is a significant obstacle to sending humans to Mars. Accurate measurements of the cosmic ray environment are needed to plan appropriate countermeasures. Most cosmic ray studies are done by balloon-borne instruments with flight times that are measured in days; these studies have shown significant variations. AMS-02 will be operative on the ISS, gathering a large amount of accurate data and allowing measurements of the long term variation of the cosmic ray flux over a wide energy range, for nuclei from protons to iron. In addition to the understanding the radiation protection required for astronauts during interplanetary flight, this data will allow the interstellar propagation and origins of cosmic rays to be identified. Results[edit] In July 2012, it was reported that AMS-02 had observed over 18 billion cosmic rays.[41] In February 2013, Samuel Ting
Samuel Ting
acknowledged that he would be publishing the first scholarly paper in a few weeks, and that in its first 18 months of operation AMS had recorded 25 billion particle events including nearly eight billion fast electrons and positrons.[42] The AMS paper reported the positron-electron ratio in the mass range of 0.5 to 350 GeV, providing evidence about the weakly interacting massive particle (WIMP) model of dark matter. On 30 March 2013, the first results from the AMS experiment were announced by the CERN
CERN
press office.[8][9][10][11][12][13][43] The first physics results were published in Physical Review Letters on 3 April 2013.[8] A total of 6.8×106 positron and electron events were collected in the energy range from 0.5 to 350 GeV. The positron fraction (of the total electron plus positron events) steadily increased from energies of 10 to 250  GeV, but the slope decreased by an order of magnitude above 20 GeV, even though the fraction of positrons still increased. There was no fine structure in the positron fraction spectrum, and no anisotropies were observed. The accompanying Physics Viewpoint[44] said that "The first results from the space-borne Alpha Magnetic Spectrometer
Spectrometer
confirm an unexplained excess of high-energy positrons in Earth-bound cosmic rays." These results are consistent with the positrons originating from the annihilation of dark matter particles in space, but not yet sufficiently conclusive to rule out other explanations. Samuel Ting
Samuel Ting
said “Over the coming months, AMS will be able to tell us conclusively whether these positrons are a signal for dark matter, or whether they have some other origin."[45] On September 18, 2014, new results with almost twice as much data were presented in a talk at CERN
CERN
and published in Physical Review Letters.[46][47][48] A new measurement of positron fraction up to 500 GeV was reported, showing that positron fraction peaks at a maximum of about 16% of total electron+positron events, around an energy of 275 ± 32 GeV. At higher energies, up to 500 GeV, the ratio of positrons to electrons begins to fall again. AMS presented for 3 days at CERN
CERN
in April 2015, covering new data on 300 million proton events and helium flux.[49] It revealed in December 2016 that it had discovered a few signals consistent with antihelium nuclei amidst several billion helium nuclei. The result remains to be verified, and the team is currently trying to rule out contamination.[50] See also[edit]

Spaceflight portal

List of space telescopes
List of space telescopes
(Astronomical Space Observatories) Payload for Antimatter
Antimatter
Matter
Matter
Exploration and Light-nuclei Astrophysics (PAMELA) – an Italian-international cosmic ray mission launched in 2006 with similar goals Scientific research on the ISS

References[edit]  This article incorporates public domain material from the National Aeronautics and Space Administration document "AMS project page".

^ Moskowitz, Clara. " NASA
NASA
Delays Last Launch of Shuttle Endeavour Due to Malfunction". Space.com. Retrieved 29 April 2011.  ^ a b Final Shuttle Flight Will Be Delayed at Least Until November for AMS Switchout – April 26th, 2010 ^ " Space Shuttle
Space Shuttle
Launch and Landing". NASA. Archived from the original on 24 May 2011. Retrieved 16 May 2011.  ^ a b "A final test for AMS at ESTEC". The Bulletin. CERN. 22 February 2010. Retrieved 20 February 2010.  ^ "AMS- NASA
NASA
meeting results". AMS collaboration. 18 April 2010.  ^ ""AMS Days at CERN" and Latest Results". AMS02.org. Retrieved 29 December 2015.  ^ "The First Five years of AMS on the International Space Station" (PDF). AMS collaboration. December 2016. Retrieved 12 December 2016.  ^ a b c d Aguilar, M.; Alberti, G.; Alpat, B.; Alvino, A.; Ambrosi, G.; Andeen, K.; Anderhub, H.; Arruda, L.; Azzarello, P.; Bachlechner, A.; Barao, F.; Baret, B.; Barrau, A.; Barrin, L.; Bartoloni, A.; Basara, L.; Basili, A.; Batalha, L.; Bates, J.; Battiston, R.; Bazo, J.; Becker, R.; Becker, U.; Behlmann, M.; Beischer, B.; Berdugo, J.; Berges, P.; Bertucci, B.; Bigongiari, G.; et al. (2013). "First Result from the Alpha Magnetic Spectrometer
Spectrometer
on the International Space Station: Precision Measurement of the Positron
Positron
Fraction in Primary Cosmic Rays of 0.5–350 GeV". Physical Review Letters. 110 (14): 141102. Bibcode:2013PhRvL.110n1102A. doi:10.1103/PhysRevLett.110.141102. PMID 25166975.  ^ a b Staff (3 April 2013). "First Result from the Alpha Magnetic Spectrometer
Spectrometer
Experiment". AMS Collaboration. Retrieved 3 April 2013.  ^ a b Heilprin, John; Borenstein, Seth (3 April 2013). "Scientists find hint of dark matter from cosmos". AP News. Retrieved 3 April 2013.  ^ a b Amos, Jonathan (3 April 2013). "Alpha Magnetic Spectrometer zeroes in on dark matter". BBC. Retrieved 3 April 2013.  ^ a b Perrotto, Trent J.; Byerly, Josh (2 April 2013). " NASA
NASA
TV Briefing Discusses Alpha Magnetic Spectrometer
Spectrometer
Results". NASA. Retrieved 3 April 2013.  ^ a b Overbye, Dennis (3 April 2013). "New Clues to the Mystery of Dark Matter". New York Times. Retrieved 3 April 2013.  ^ http://home.web.cern.ch/about/updates/2013/04/ams-experiment-measures-antimatter-excess-space ^ a b Overbye, Dennis (3 April 2007). "Long-Awaited Cosmic-Ray Detector May Be Shelved". The New York Times.  ^ AMS Collaboration; Aguilar, M.; Alcaraz, J.; Allaby, J.; Alpat, B.; Ambrosi, G.; Anderhub, H.; Ao, L.; et al. (August 2002). "The Alpha Magnetic Spectrometer
Spectrometer
(AMS) on the International Space Station: Part I – results from the test flight on the space shuttle". Physics Reports. 366 (6): 331–405. Bibcode:2002PhR...366..331A. doi:10.1016/S0370-1573(02)00013-3.  ^ Controversy Follows Pricey Space Station Experiment to Launch Pad, SCIENCE, VOL. 332, 22 APRIL 2011 ^ Monreal, Benjamin. "AMS experiment mission overview". AMS Experiment Guided Tour. AMS-02 Collaboration. Retrieved 3 September 2009.  ^ "LEAVING CERN, ON THE WAY TO ESTEC". AMS in The News. AMS-02. February 16, 2010.  ^ "Dark Matter
Matter
Detective Arrives At ESTEC" (PDF). Space Daily. spacedaily.com. Feb 17, 2010.  ^ Video on youtube of AMS being airlifted with C5 Galaxy from GVA airport on 26 August ^ "Waiting for the Alpha Magnetic Spectrometer". ESA News. 17 December 2009. Archived from the original on 26 January 2010. Retrieved 9 January 2010.  ^ "AMS To Get Longer Lease On Life". Aviation Week and Space Technology. 23 April 2010. Archived from the original on March 26, 2012. Retrieved 23 April 2010.  ^ Achenbach, Joel (8 January 2014). "NASA: International space station operation extended by Obama until at least 2024". washingtonpost.com. Retrieved 19 February 2014.  ^ Clark, Greg (15 October 1999). " NASA
NASA
Puts Big Bang
Big Bang
to the Test". SPACE.com. Archived from the original on 3 February 2003. Retrieved 20 September 2009.  ^ George Musser (May 2011). "Cosmic-Ray Detector on Space Shuttle
Space Shuttle
Set to Scan Cosmos for Dark Matter". Scientific American. Retrieved January 24, 2014.  ^ Hsu, Jeremy (2 September 2009). "Space Station Experiment to Hunt Antimatter
Antimatter
Galaxies". Space.com. Archived from the original on 6 October 2009. Retrieved 2 September 2009.  ^ a b Kaufman, Marc (2 December 2007). "The Device NASA
NASA
Is Leaving Behind". Washington Post. Retrieved 2 December 2007.  ^ bill ^ Iannotta, Becky (19 May 2008). "House Bill Would Authorize Additional Shuttle Flights". Space.com. Archived from the original on 20 May 2008. Retrieved 19 May 2008.  ^ David Kestenbaum (10 June 2008). NASA
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balks at Taking Physics Gear Into Space (Radio production). Washington, D.C.: National Public Radio. Retrieved 10 June 2008.  ^ "House Sends NASA
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Bill to President's Desk, Reaffirms Commitment to Balanced and Robust Space and Aeronautics Program" (Press release). House Science and Technology Committee. 27 September 2008. Archived from the original on 27 May 2010.  ^ Matthews, Mark (15 October 2008). "Bush Signs NASA
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Authorization Act". Orlando Sentinel. Archived from the original on 19 October 2008.  ^ "Major Actions: H.R. 6063". THOMAS (Library of Congress).  ^ CERN
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News – Aug 28, 2010: AMS From CERN
CERN
to Space! ^ "Consolidated Launch Manifest". NASA. 25 August 2009. Archived from the original on 31 August 2009. Retrieved 3 September 2009.  ^ a b "Alpha Magnetic Spectrometer
Spectrometer
– 02 (AMS-02)". NASA. 21 August 2009. Archived from the original on 16 August 2009. Retrieved 3 September 2009.  ^ a b http://www.ams02.org/what-is-ams/ams-facts-figures/ ^ Blau, B.; Harrison, S.M.; Hofer, H.; Horvath, I.L.; Milward, S.R.; Ross, J.S.H.; Ting, S.C.C.; Ulbricht, J.; Viertel, G. (2002). "The superconducting magnet system of AMS-02 – a particle physics detector to be operated on the International Space Station". IEEE Transactions on Appiled Superconductivity. 12 (1): 349–352. doi:10.1109/TASC.2002.1018417.  ^ Monreal, Benjamin. "The AMS Experiment". MIT. Archived from the original on 9 February 2010. Retrieved 3 September 2009.  ^ Palmer, Jason (2012-07-25). "Alpha Magnetic Spectrometer
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claims huge cosmic ray haul". BBC
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News Online. Retrieved 2013-02-18.  ^ Amos, Jonathan (2013-02-18). "Alpha Magnetic Spectrometer
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to release first results". BBC
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News Online. Retrieved 2013-02-18.  ^ "First result from the AMS experiment". CERN
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press office. 30 March 2013. Archived from the original on 7 April 2013. Retrieved 3 April 2013.  ^ Coutu, S. (2013). "Positrons Galore". Physics. 6. Bibcode:2013PhyOJ...6...40C. doi:10.1103/Physics.6.40.  ^ "AMS experiment measures antimatter excess in space".  ^ L Accardo; AMS Collaboration (18 September 2014). "High Statistics Measurement of the Positron
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Fraction in Primary Cosmic Rays of 0.5–500 GeV with the Alpha Magnetic Spectrometer
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on the International Space Station" (PDF). Physical Review Letters. 113: 121101. Bibcode:2014PhRvL.113l1101A. doi:10.1103/PhysRevLett.113.121101.  ^ "New results from the Alpha Magnetic Spectrometer
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Hints from Cosmic Rays?". American Physical Society. Retrieved 21 September 2014.  ^ "Physics community to discuss latest results of the AMS experiment CERN
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press office". press.web.cern.ch. Retrieved 2015-07-23.  ^ Joshua Sokol (April 2017). "Giant space magnet may have trapped antihelium, raising idea of lingering pools of antimatter in the cosmos". Science. 

Further reading[edit]

AMS Collaboration (2011). "Isotopic Composition of Light Nuclei in Cosmic Rays: Results from AMS-01". Astrophys. J. 736: 105. arXiv:1106.2269 . Bibcode:2011ApJ...736..105A. doi:10.1088/0004-637X/736/2/105.  AMS Collaboration (2010). "Relative Composition and Energy Spectra of Light Nuclei in Cosmic Rays. Results from AMS-01". Astrophys. J. 724: 329–340. Bibcode:2010ApJ...724..329A. doi:10.1088/0004-637X/724/1/329.  AMS Collaboration (2007). "Cosmic-ray positron fraction measurement from 1 to 30- GeV with AMS-01". Phys. Lett. B. 646: 145–154. arXiv:astro-ph/0703154 . Bibcode:2007PhLB..646..145A. doi:10.1016/j.physletb.2007.01.024.  AMS Collaboration (2005). "A study of cosmic-ray secondaries induced by the MIR Space Station using AMS-01". Nucl. Instrum. Meth. B. 234: 321–332.  AMS Collaboration (2002). "The AMS on the ISS. Part I - Results from the test flight on the Space Shuttle". Physics Reports. 366: 331–405. Bibcode:2002PhR...366..331A. doi:10.1016/S0370-1573(02)00013-3.  AMS Collaboration (2000). "Helium in near Earth orbit". Phys. Lett. B. 494: 193–202. Bibcode:2000PhLB..494..193A. doi:10.1016/S0370-2693(00)01193-X.  AMS Collaboration (2000). "Cosmic Protons". Phys. Lett. B. 490: 27–35. Bibcode:2000PhLB..490...27A. doi:10.1016/S0370-2693(00)00970-9.  AMS Collaboration (2000). "Leptons in near earth orbit". Phys. Lett. B. 484: 10–22. Bibcode:2000PhLB..484...10A. doi:10.1016/S0370-2693(00)00588-8.  AMS Collaboration (2000). "Protons in near earth orbit". Phys. Lett. B. 472: 215–226. arXiv:hep-ex/0002049 . Bibcode:2000PhLB..472..215A. doi:10.1016/S0370-2693(99)01427-6.  AMS Collaboration (1999). "Search for anti-helium in cosmic rays". Phys. Lett. B. 461: 387–396. arXiv:hep-ex/0002048 . Bibcode:1999PhLB..461..387A. doi:10.1016/S0370-2693(99)00874-6. 

Sandweiss, J. (2004). "Overview of strangelet searches and Alpha Magnetic Spectrometer: when will we stop searching?". Journal of Physics G: Nuclear and Particle Physics. 30 (1): S51–S59. Bibcode:2004JPhG...30S..51S. doi:10.1088/0954-3899/30/1/004. 

External links[edit]

Wikimedia Commons has media related to Alpha Magnetic Spectrometer.

AMS Collaboration Homepage AMS Homepage at CERN. Inc. construction diagrams. AMS Homepage at the Johnson Space Center NASA
NASA
AMS-02 Project Fact Sheet NASA
NASA
AMS-02 Project Home Page with real-time cosmic ray count An animated movie of the STS-134
STS-134
mission showing the installation of AMS-02 (72MB) Alpha Magnetic Spectrometer
Spectrometer
– image collection – AMS-02 on Facebook A Costly Quest for the Dark Heart of the Cosmos (New York Times, 16 November 2010) Route To Space Alliance - European Transport for The Space and Aeronautic Industries

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(2019) Astro-1 Telescope (2020) Euclid (2020) James Webb (JWST) (2020) Nano-JASMINE (2020) ORBIS (2020) IXPE (2021) Spektr-UV
Spektr-UV
(2021) SVOM (2021) XARM (2021) Space Solar Telescope Xuntian (2022) K-EUSO (2023) Solar-C (2023) WFIRST (2025+) PLATO (2026) Spektr-M (2026+) ARIEL (2028) ATHENA (2028) LISA (2034)

Proposed

AstroSat-2 ATLAST EXCEDE Fresnel Imager FINESSE FOCAL HabEx HDST Hibari Hypertelescope JEM-EUSO LiteBIRD LUVOIR Lynx NEOCam New Worlds Mission NRO donation to NASA OST PhoENiX Small-JASMINE Sentinel Solar-D SPICA THEIA

Retired

Akari (Astro-F) (2006–11) ALEXIS (1993–2005) ATM (1973–74) ASCA (Astro-D) (1993–2000) Astro-1 (BBXRT HUT) (1990) Astro-2 (HUT) (1995) Astron (1983–89) ANS (1974–76) BeppoSAX
BeppoSAX
(1996–2003) CHIPSat
CHIPSat
(2003–08) Compton (CGRO) (1991–2000) CoRoT
CoRoT
(2006–13) Cos-B
Cos-B
(1975–82) COBE (1989–93) EPOCh (2008) EPOXI
EPOXI
(2010) EXOSAT
EXOSAT
(1983–86) EUVE (1992–2001) FUSE (1999–2007) Kvant-1
Kvant-1
(1987–2001) GALEX
GALEX
(2003–13) Gamma (1990–92) Ginga (Astro-C) (1987–91) Granat
Granat
(1989–98) Hakucho
Hakucho
(CORSA-b) (1979–85) HALCA (MUSES-B) (1997–2005) HEAO-1 (1977–79) Herschel (2009–13) Hinotori (Astro-A) (1981–91) HEAO-2 (Einstein Obs.) (1978–82) HEAO-3 (1979–81) HETE-2 (2000–07?) Hipparcos
Hipparcos
(1989–93) IUE (1978–96) IRAS
IRAS
(1983) IRTS (1995–96) ISO (1996–98) IXAE (1996–2004) Kristall
Kristall
(1990–2001) LEGRI (1997–2002) LISA Pathfinder
LISA Pathfinder
(2015–17) MSX (1996–97) OAO-2 (1968–73) OAO-3 (Copernicus) (1972–81) Orion 1/2 (1971/1973) PAMELA (2006–16) Planck (2009–13) RELIKT-1
RELIKT-1
(1983–84) ROSAT
ROSAT
(1990–99) RXTE (1995–2012) SAMPEX (1992–2004) SAS-B (1972–73) SAS-C (1975–79) Suzaku (Astro-EII) (2005–15) Taiyo (SRATS) (1975-80) Tenma
Tenma
(Astro-B) (1983–1985) Uhuru (1970–73) WMAP (2001–10) WISE (first mission: 2009–11) Yokoh (Solar-A) (1991–2001)

Hibernating (Mission completed)

SWAS (1998–2005) TRACE
TRACE
(1998–2010)

Lost

OAO-1/OAO-B (1966/1970) CORSA (1976) ABRIXAS
ABRIXAS
(1999) HETE (1996) WIRE (1999) Astro-E
Astro-E
(2000) Tsubame (2014–) Hitomi (Astro-H) (2016)

Cancelled

Astro-G Constellation-X Darwin Destiny EChO Eddington FAME GEMS IXO JDEM LOFT SIM & SIMlite SNAP TAUVEX TPF XEUS XIPE

See also

Great Observatories program List of space telescopes List of proposed space observatories List of X-ray space telescopes

Category

v t e

Dark matter

Forms of dark matter

Baryonic dark matter Cold dark matter Hot dark matter Light dark matter Mixed dark matter Warm dark matter Self-interacting dark matter Scalar field dark matter Primordial black holes

Hypothetical particles

Axino Axion Dark photon Holeum LSP Minicharged particle Neutralino Sterile neutrino SIMP WIMP

Theories and objects

Cuspy halo problem Dark fluid Dark galaxy Dark globular cluster Dark matter
Dark matter
halo Dark radiation Dark star Dwarf galaxy problem ELKO field Halo mass function Massive compact halo object Mirror matter Navarro–Frenk–White profile Scalar field dark matter

Search experiments

Direct detection

ANAIS ArDM ADMX CDEX (1, 10, 1T) CDMS (I, II, SuperCDMS, GEODM) CoGeNT COSINE (100) COUPP (4, 3600) CRESST (I, II) CUORE
CUORE
(0, CUORICINO) D3 (Micro-D3) DAMA/LIBRA DAMA/NaI DAMIC (DAMIC100) DarkSide DEAP
DEAP
(1, 3600) DMTPC DRIFT (I, IIa,b,c,d,e, III, Mini-DRIFT) EDELWEISS EURECA KIMS LUX LZ MIMAC MiniCLEAN NAIAD NEWAGE (0.3a, 0.3b') PandaX PICASSO PICO
PICO
(2L, 60) SABRE SIMPLE TREX-DM UKDMC WARP XENON
XENON
(10, 100, 1T) XMASS (I, 1.5, II) ZEPLIN (I, II, III)

Indirect detection

AMS-02 ATIC CALET CAST DAMPE IceCube MOA OGLE PAMELA

Other projects

MultiDark PVLAS SNOLAB

Potential dark galaxies

HE0450-2958 HVC 127-41-330 Smith's Cloud VIRGOHI21

Related

Dark energy Exotic matter Galaxy formation and evolution Illustris project

v t e

← 2010  ·  Orbital launches in 2011  ·  2012 →

Elektro-L No.1 USA-224
USA-224
Kounotori 2
Kounotori 2
Progress M-09M
Progress M-09M
(Kedr) Kosmos 2470 USA-225
USA-225
Johannes Kepler ATV
Johannes Kepler ATV
STS-133
STS-133
(Leonardo) Kosmos 2471 Glory · Explorer-1 [Prime] · KySat-1 · Hermes USA-226 USA-227 Soyuz TMA-21
Soyuz TMA-21
Compass-IGSO3
Compass-IGSO3
USA-229 Resourcesat-2 · YouthSat · X-Sat
X-Sat
Yahsat 1A · New Dawn Progress M-10M
Progress M-10M
Meridian 4 USA-230 STS-134
STS-134
(AMS-02 · ELC-3) Telstar 14R ST-2 · GSAT-8
GSAT-8
/ INSAT-4G Soyuz TMA-02M SAC-D
SAC-D
Rasad 1 ChinaSat 10 Progress M-11M
Progress M-11M
Kosmos 2472 USA-231
USA-231
Shijian XI-03 STS-135 (Raffaello · PSSC-2) Tianlian I-02 Globalstar M083 · Globalstar M088 · Globalstar M091 · Globalstar M085 · Globalstar M081 · Globalstar M089 GSAT-12
GSAT-12
SES-3 · KazSat-2 USA-232
USA-232
Spektr-R
Spektr-R
Compass-IGSO4
Compass-IGSO4
Shijian XI-02 Juno Astra 1N · BSAT-3c/ JCSAT-110R Paksat-1R Hai Yang 2A Sich 2 · NigeriaSat-2 · NigeriaSat-X · RASAT · EduSAT · AprizeSat-5 · AprizeSat-6 · BPA-2 Ekspress AM4 Shijian XI-04 Progress M-12M GRAIL-A  · GRAIL-B Zhongxing-1A Kosmos 2473 Arabsat 5C · SES-2 IGS Optical 4 Atlantic Bird 7 TacSat-4 Tiangong-1
Tiangong-1
QuetzSat 1 Kosmos 2474 Intelsat 18 Eutelsat W3C Megha-Tropiques · SRMSAT · VesselSat-1 · Jugnu ViaSat-1 Thijs  · Natalia NPP  · E1P-U2  · RAX-2
RAX-2
 · M-Cubed  · DICE-1 · DICE-2  · AubieSat-1
AubieSat-1
Progress M-13M
Progress M-13M
(Chibis-M) Shenzhou 8
Shenzhou 8
Kosmos 2475  · Kosmos 2476  · Kosmos 2477 Fobos-Grunt
Fobos-Grunt
 · Yinghuo-1
Yinghuo-1
Yaogan 12  · Tian Xun-1 Soyuz TMA-22
Soyuz TMA-22
Shiyan Weixing 4  · Chuang Xin 1C AsiaSat 7
AsiaSat 7
Mars Science Laboratory (Curiosity) Kosmos 2478 Yaogan 13 Compass-IGSO5
Compass-IGSO5
Amos-5 · Luch 5A
Luch 5A
IGS Radar 3 Pléiades-HR 1A · SSOT · ELISA 1 · ELISA 2 · ELISA 3 · ELISA 4 NigComSat-1R Soyuz TMA-03M Ziyuan-1C Meridian 5 Globalstar M080 · Globalstar M082 · Globalstar M084 · Globalstar M086 · Globalstar M090 · Globalstar M092

Payloads are separated by bullets ( · ), launches by pipes ( ). Manned flights are indicated in bold text. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in

.