|
Michał Gryziński
Michał Gryziński (29 September 1930 - 1 June 2004) was a Polish nuclear physicist specialized in plasma physics. In 1965 he developed some widely used empirical models to reproduce some of the results of electron scattering experiments. Life Michał Gryziński was born in 1930, son of Jan and Stefania, in Anin, Warsaw, Poland. He studied in Władysław IV school in Warsaw and obtained a master's degree in engineering from Warsaw University of Technology in 1955. He would have then started working with , and then moved to work at the (IBJ) in Świerk, Otwock County, Poland, under the supervision of Andrzej Sołtan. He wrote a doctorate thesis in theoretical physics at IBJ in 1965, but was rejected, partially for his critique to quantum mechanics. He never obtained a doctorate degree. He later initiated research in plasma devices. From 1959 onward, he led the plasma research group at IBJ. In 1973, when a department for plasma physics was established, he was appointed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Michał Grażyński
Michał Grażyński (12 May 1890 in Gdów as Michał Tadeusz Kurzydło – 10 December 1965 in London, United Kingdom) was a Polish military leader, social and political activist, doctor of philosophy and law, voivode of the Silesian Voivodeship, Scouting activist and president of Związek Harcerstwa Polskiego. Born to a teacher's family in Gdów, in Austrian-ruled Polish Galicia, he attended Gimnazjum Św. Anny (St.Anna-Gymnasium) in Kraków and Jagiellonian University, where he graduated in 1913, receiving the degree of Doctor of Philosophy for a dissertation about the history of the Polish monetary system. In 1914 he started work as teacher in Stanisławów (now Ivano-Frankivs'k, Ukraine), but after the 1st World War broke out he was mobilized into the Austro-Hungarian Army in the rank of Sub-Lieutenant, served on the Eastern Front and was wounded. In 1918 he joined the Polish Army and served in the intelligence and propaganda branch with the rank of Lieutenant. In 1919 dur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Classical Mechanics
Classical mechanics is a physical theory describing the motion of macroscopic objects, from projectiles to parts of machinery, and astronomical objects, such as spacecraft, planets, stars, and galaxies. For objects governed by classical mechanics, if the present state is known, it is possible to predict how it will move in the future (determinism), and how it has moved in the past (reversibility). The earliest development of classical mechanics is often referred to as Newtonian mechanics. It consists of the physical concepts based on foundational works of Sir Isaac Newton, and the mathematical methods invented by Gottfried Wilhelm Leibniz, Joseph-Louis Lagrange, Leonhard Euler, and other contemporaries, in the 17th century to describe the motion of bodies under the influence of a system of forces. Later, more abstract methods were developed, leading to the reformulations of classical mechanics known as Lagrangian mechanics and Hamiltonian mechanics. These advances, ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Order Of Merit Of The Republic Of Poland
The Order of Merit of the Republic of Poland ( pl, Order Zasługi Rzeczypospolitej Polskiej) is a Polish order of merit created in 1974, awarded to persons who have rendered great service to Poland. It is granted to foreigners or Poles resident abroad. As such it is sometimes referred to as a traditional "diplomatic order". History The order was established by an act of 10 April 1974, as the Order of Merit of the Polish People's Republic (''Order Zasługi Polskiej Rzeczypospolitej Ludowej''). The need for the new order had arisen since the Order of the White Eagle had fallen into disuse after the foundation of the People's Republic. Reflecting this history, the two orders utilized similar colors and designs. The Order of Merit of the Polish People's Republic was awarded in five classes: Grand Cordon of the Order, Commandery with Star, Commandery, Gold Badge of the Order, and Silver Badge of the Order. It was awarded by the Polish Council of State. After the fall of communism i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Order Of Polonia Restituta
The Order of Polonia Restituta ( pl, Order Odrodzenia Polski, en, Order of Restored Poland) is a Polish state decoration, state Order (decoration), order established 4 February 1921. It is conferred on both military and civilians as well as on alien (law), foreigners for outstanding achievements in the fields of education, science, sport, culture, art, economics, national security, national defense, social work, civil service, or for furthering good relations between countries. The Order of Polonia Restituta is sometimes regarded as Poland's successor to the ''Order of the Knights of Saint Stanislaus, Bishop and Martyr'', known as the Order of Saint Stanislaus, established in 1765 by Stanisław August Poniatowski, the last King of the Polish–Lithuanian Commonwealth, to honor supporters of the Polish crown. History When Poland regained its independence from the German Empire, Austro-Hungarian Empire, and Russian Empire in 1918, the new Polish government abolished the activities ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Born Approximation
Generally in scattering theory and in particular in quantum mechanics, the Born approximation consists of taking the incident field in place of the total field as the driving field at each point in the scatterer. The Born approximation is named after Max Born who proposed this approximation in early days of quantum theory development. It is the perturbation method applied to scattering by an extended body. It is accurate if the scattered field is small compared to the incident field on the scatterer. For example, the scattering of radio waves by a light styrofoam column can be approximated by assuming that each part of the plastic is polarized by the same electric field that would be present at that point without the column, and then calculating the scattering as a radiation integral over that polarization distribution. Born approximation to the Lippmann–Schwinger equation The Lippmann–Schwinger equation for the scattering state \vert\rangle with a momentum p and out-going ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plasma (physics)
Plasma () 1, where \nu_ is the electron gyrofrequency and \nu_ is the electron collision rate. It is often the case that the electrons are magnetized while the ions are not. Magnetized plasmas are ''anisotropic'', meaning that their properties in the direction parallel to the magnetic field are different from those perpendicular to it. While electric fields in plasmas are usually small due to the plasma high conductivity, the electric field associated with a plasma moving with velocity \mathbf in the magnetic field \mathbf is given by the usual Lorentz force, Lorentz formula \mathbf = -\mathbf\times\mathbf, and is not affected by Debye shielding. Mathematical descriptions To completely describe the state of a plasma, all of the particle locations and velocities that describe the electromagnetic field in the plasma region would need to be written down. However, it is generally not practical or necessary to keep track of all the particles in a plasma. Therefore, plasma physicist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ion Beam
An ion beam is a type of charged particle beam consisting of ions. Ion beams have many uses in electronics manufacturing (principally ion implantation) and other industries. A variety of ion beam sources exists, some derived from the mercury vapor thrusters developed by NASA in the 1960s. The most common ion beams are of singly-charged ions. Units Ion current density is typically measured in mA/cm^2, and ion energy in eV. The use of eV is convenient for converting between voltage and energy, especially when dealing with singly-charged ion beams, as well as converting between energy and temperature (1 eV = 11600 K). Broad-beam ion sources Most commercial applications use two popular types of ion source, gridded and gridless, which differ in current and power characteristics and the ability to control ion trajectories. In both cases electrons are needed to generate an ion beam. The most common electron emitters are hot filament and hollow cathode. Gridded ion source In a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plasma Acceleration
Plasma acceleration is a technique for accelerating charged particles, such as electrons, positrons, and ions, using the electric field associated with electron plasma wave or other high-gradient plasma structures (like shock and sheath fields). The plasma acceleration structures are created either using ultra-short laser pulses or energetic particle beams that are matched to the plasma parameters. These techniques offer a way to build high performance particle accelerators of much smaller size than conventional devices. The basic concepts of plasma acceleration and its possibilities were originally conceived by Toshiki Tajima and John M. Dawson of UCLA in 1979. The initial experimental designs for a "wakefield" accelerator were conceived at UCLA by Chandrashekhar J. Joshi et al. Current experimental devices show accelerating gradients several orders of magnitude better than current particle accelerators over very short distances, and about one order of magnitude better (1 GeV/m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dense Plasma Focus
A dense plasma focus (DPF) is a type of plasma generating system originally developed as a fusion power device starting in the early 1960s. The system demonstrated scaling laws that suggested it would not be useful in the commercial power role, and since the 1980s it has been used primarily as a fusion teaching system, and as a source of neutrons and X-rays. The original concept was developed in 1954 by N.V. Filippov, who noticed the effect while working on early pinch machines in the USSR. A major research program on DPF was carried out in the USSR through the late 1950s, and continues to this day. A different version of the same basic concept was independently discovered in the US by J.W. Mather in the early 1960s. This version saw some development in the 1970s, and variations continue to be developed. The basic design derives from the z-pinch concept. Both the DPF and pinch use large electrical currents run through a gas to cause it to ionize into a plasma and then '' pinch'' do ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Fusion
Nuclear fusion is a reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles ( neutrons or protons). The difference in mass between the reactants and products is manifested as either the release or absorption of energy. This difference in mass arises due to the difference in nuclear binding energy between the atomic nuclei before and after the reaction. Nuclear fusion is the process that powers active or main-sequence stars and other high-magnitude stars, where large amounts of energy are released. A nuclear fusion process that produces atomic nuclei lighter than iron-56 or nickel-62 will generally release energy. These elements have a relatively small mass and a relatively large binding energy per nucleon. Fusion of nuclei lighter than these releases energy (an exothermic process), while the fusion of heavier nuclei results in energy retained by the product nucleons, and the resulting reaction is endo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hot Plasma
Plasma ()πλάσμα , Henry George Liddell, Robert Scott, ''A Greek English Lexicon'', on Perseus is one of the . It contains a significant portion of charged particles – s and/or s. The presence of these charged particles is what primarily sets plasma apart from the other fundamental states of matter. It is the most abundant form of |
