Ando Akira, Tashiro Masashi, Hitomi Keiichiro, Hattori Kunihiko, Inutake Masaaki
Department of Electrical Engineering, School of Engineering, Tohoku University, Miyagi, Japan.
Rev Sci Instrum. 2008 Feb;79(2 Pt 2):02B705. doi: 10.1063/1.2801645.
Fundamental characteristics of beam extraction from a Hall-type accelerator working with permanent magnets were investigated. Ions were extracted by an axial electric field E(z) in a small annular plasma channel with a radial magnetic field B(r). Effects of discharge current and voltage, length of discharge channel, and gas flow rate were examined. It can deliver a large beam current density of more than 100 mA/cm(2) with low beam energy of 50 eV. By biasing an additional plasma chamber attached at the extraction area, the beam energy was controlled independently of the beam current.
研究了使用永久磁铁的霍尔型加速器束流引出的基本特性。在具有径向磁场B(r)的小环形等离子体通道中，离子通过轴向电场E(z)引出。研究了放电电流和电压、放电通道长度以及气体流速的影响。它可以在50 eV的低束流能量下提供超过100 mA/cm²的大束流密度。通过对附着在引出区域的附加等离子体腔室施加偏压，可以独立于束流控制束流能量。
