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The safety factor, labeled q or q(r), is the ratio of the times a particular magnetic field line travels around a toroidal confinement area's "long way" (toroidally) to the "short way" (poloidally). The term "safety" refers to the resulting stability of the plasma; plasmas that rotate around the torus poloidally about the same number of times ...
An often cited description of the sawtooth relaxation is that by Kadomtsev. [2] The Kadomtsev model uses a resistive magnetohydrodynamic (MHD) description of the plasma. If the amplitude of the current density in the plasma core is high enough so that the central safety factor is below unity, a = linear eigenmode will be unstable, where is the poloidal mode number.
A tokamak (/ ˈ t oʊ k ə m æ k /; Russian: токамáк) is a device which uses a powerful magnetic field generated by external magnets to confine plasma in the shape of an axially symmetrical torus. [1] The tokamak is one of several types of magnetic confinement devices being developed to produce controlled thermonuclear fusion power.
A spherical tokamak is a type of fusion power device based on the tokamak principle. It is notable for its very narrow profile, or aspect ratio . A traditional tokamak has a toroidal confinement area that gives it an overall shape similar to a donut , complete with a large hole in the middle.
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As of 2023 the device is known as JT-60SA and is the largest operational superconducting tokamak in the world, [1] built and operated jointly by the European Union and Japan in Naka, Ibaraki Prefecture. [2] [3] SA stands for super advanced tokamak, including a D-shaped plasma cross-section, superconducting coils, and active feedback control.
Richard Gibson McSpadden (1960 – October 1, 2023) [1] was an American educator and pilot. He became the Aircraft Owners and Pilots Association (AOPA) Air Safety Institute (ASI) senior vice-president in 2020, having previously been its executive director from 2017.
Barton was shot and killed by police while holding a gun. Later in the year, Barton's son was non-fatally shot by police in Salt Lake City. [54] [55] 2020-01-16: Jack D. Bolinger (35) White: Wisconsin (Wausau) Bolinger was shot and killed by police. [56] 2020-01-16: Murbarak Soulemane (19) Black: Connecticut (West Haven) Soulemane was shot and ...
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