Ion beam acceleration in a divergent magnetic field

被引：30
|
作者：
Biloiu, Ioana A. [1 ]
Scime, Earl E. [1 ]
Biloiu, Costel [2 ]
机构：
[1] W Virginia Univ, Dept Phys, Morgantown, WV 26506 USA
[2] Varian Semicond Equipment Associates, Gloucester, MA 01930 USA
来源：
APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 19期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1063/1.2927478
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Two-dimensional argon ion velocity distribution functions (IVDFs) in the expansion region of a helicon plasma source have been measured by laser-induced-fluorescence tomography. Below a threshold value of the magnetic field in the expansion region, the IVDFs show a bimodal structure comprised of a supersonic ion population axially moving away from the source and an isotropic, slow, background, ion population. Increasing the magnetic field divergence leads to an increase in the axial speed of the supersonic component. A maximum axial speed of similar to 2.9c(s) was obtained for a source/expansion magnetic field ratio of 43. (C) 2008 American Institute of Physics.
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