Sorokin A, Belov V, Davydenko V, Deichuli P, Ivanov A, Podyminogin A, Shikhovtsev I, Shulzhenko G, Stupishin N, Tiunov M
Budker Institute of Nuclear Physics, Lavrentev Ave. 11, Novosibirsk 630090, Russia.
Rev Sci Instrum. 2010 Feb;81(2):02B108. doi: 10.1063/1.3266141.
Neutral beam with geometrical focusing for plasma heating in moderate-size plasma devices has been developed in Budker Institute of Nuclear Physics, Novosibirsk. When operated with hydrogen, the neutral beam power is 1 MW, pulse duration is 1 s, beam energy is 40 keV, and angular divergence is 1.2 degrees. Initial ion beam is extracted and accelerated by triode multiapertures ion-optical system. To produce 1 MW neutral beam, about 40 A proton current is extracted with nominal current density of 320 mA/cm(2). Ion-optical system has 200 mm diameter grids with 44% transparency. The grids have inertia cooling and heat is removed between the pulses by water flowing in channels placed on periphery of the grids. A plasma emitter for ion extraction is produced by rf-plasma box. Ion species mix of rf plasma source amounts to 70%, 20%, and 10% of H(+), H(2)(+), and H(3)(+) ions, respectively, by current. Heavy impurities contribute less than 0.3%.
位于新西伯利亚的布德克尔核物理研究所已开发出用于中等规模等离子体装置中进行等离子体加热的具有几何聚焦功能的中性束。当使用氢气运行时，中性束功率为1兆瓦，脉冲持续时间为1秒，束能量为40千电子伏，角散度为1.2度。初始离子束由三极管多孔径离子光学系统引出并加速。为产生1兆瓦的中性束，提取约40安的质子电流，标称电流密度为320毫安/平方厘米。离子光学系统具有直径200毫米、透明度为44%的栅极。栅极采用惯性冷却，脉冲之间通过在栅极周边通道中流动的水来散热。用于离子引出的等离子体发射器由射频等离子体盒产生。射频等离子体源的离子种类混合按电流计分别为H⁺、H₂⁺和H₃⁺离子的70%、20%和10%。重杂质含量低于0.3%。
