SELF-SUSTAINED SELF-SPUTTERING - A POSSIBLE MECHANISM FOR THE SUPERDENSE GLOW PHASE OF A PSEUDOSPARK

被引：51
作者：
ANDERS, A
ANDERS, S
GUNDERSEN, MA
MARTSINOVSKII, AM
机构：
[1] UNIV SO CALIF,DEPT PHYS,LOS ANGELES,CA 90089
[2] ACAD SCI ST PETERSBURG,AF IOFFE PHYSICOTECH INST,ST PETERSBURG 194021,RUSSIA
来源：
IEEE TRANSACTIONS ON PLASMA SCIENCE | 1995年 / 23卷 / 03期
关键词：
D O I：
10.1109/27.402313
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
Self-sustained self-sputtering occurring during high current pseudospark operation (approximate to 10(4) A/cm(2), I>10(3) A) is shown to be a possible mechanism for the superdense glow. The mean-free-path for ionization of cathode material sputtered in the low-current hollow-cathode phase can be shorter than the cathode-anode gap distance, and ionized atoms can return to the cathode surface, self-sputtering with a yield greater than one. The self-sputtered cathode atoms become ionized in the beam of electrons accelerated in the cathode sheath. A large fraction of the discharge current at the cathode surface can be carried uniformly over the surface by ions, and a very high electron emission density is not required to maintain the high current.
引用
收藏
页码：275 / 282
页数：8
相关论文
共 40 条
  • [1] Abramovich L.Y., Klyarfel'd B.N., Nastich Y.N., Superdense hollow-cathode glow discharge, Zh. Tekh. Fiz., 36, 4, pp. 714-719, (1966)
  • [2] Bloess D., Kamber I., Riege H., Bittner G., Brueckner V., Et al., The triggered pseudo-spark chamber as a fast switch and as a high-intensity beam source, Nucl. Instrum. Methods, 205, pp. 173-184, (1983)
  • [3] Hartmann W., Gundersen M.A., Origin of anomalous emission in superdense glow discharge, Phys. Rev. Lett., 60, 23, pp. 2371-2374, (1988)
  • [4] Hartmann W., Dominic V., Kirkman G.F., Gundersen M.A., An analysis of the anomalous high-current cathode emission in pseudospark and back-of-the-cathode lighted thyratron switches, J. Appl Phys., 65, 11, pp. 4388-4395, (1989)
  • [5] Sommerer T.J., Pak H., Kushner M.J., Cathode heating mechanisms in pseudospark switches, J. Appl. Phys., 72, 8, pp. 3374-3383, (1992)
  • [6] Hartmann W., Lins G., The spatial and temporal development of pseudospark switch plasmas, IEEE Trans. Plasma Sci., 21, pp. 506-510, (1993)
  • [7] Puchkarev V.F., Fast processes on cathode surface resulting in pseudospark discharge, IEEE Trans. Plasma Sci., 21, pp. 725-730, (1993)
  • [8] Anders A., Anders S., Gundersen M.A., Model for explosive electron emission in a pseudospark ‘superdense’ glow, Phys. Rev. Lett., 71, 3, pp. 364-367, (1993)
  • [9] Anders A., Anders S., Gundersen M.A., Electron emission from pseudospark cathodes, J. Appl. Phys., 76, 3, (1994)
  • [10] Kaminsky M., Atomic and Ionic Impact Phenomena on Metal Surfaces, (1965)
1234