Electron production in low pressure gas ionized by an intense proton beam
作者： B. V. Oliver , P. F. Ottinger , D. V. Rose , D. D. Hinshelwood , J. M. Neri
DOI: 10.1063/1.873203
关键词: Ionization 、 Beam (structure) 、 Plasma 、 Electron density 、 Electron 、 Atomic physics 、 Ion 、 Ion beam 、 Proton 、 Physics
摘要: Electron density measurements from previous ion-beam-induced gas ionization experiments [F. C. Young et al., Phys. Plasmas 1, 1700 (1994)] are re-analyzed and compared with a recent theoretical model [B. V. Oliver 3, 3267 (1996)]. Ionization is produced by 1 MeV, 3.5 kA, 55 ns pulse-duration, proton beam, injected into He, Ne, or Ar in the Torr pressure regime. Theoretical numerical analysis indicates that, after an initial electron population ion beam impact, dominated background plasma electrons proportional to stopping power. The predicted agrees measured densities within factor of 2 uncertainty measurement. However, case Ar, theoretically systematically greater than values. assumptions Maxwellian distribution for neglect energy loss discrete excitation inner sh...
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