Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1865810 | Physics Letters A | 2009 | 5 Pages |
Abstract
In this Letter, plasma distribution on a carbon-fiber-aluminum (CFA) cathode powered by a â¼450 kV, â¼350 ns, â¼50ΩHV pulse generator is investigated by time-and-space-resolved electrical and optical diagnostics. A quasi stationary behavior of cathode plasma expansion into the vacuum gap was observed during the main pulse. The cathode plasma distribution is characterized by individual plasma spots. It was shown by optical and X-ray measurements that the uniformity of the extracted electron beam is satisfactory in spite of the individual plasma spots. A mechanism for this phenomenon is suggested. Relativistic electron beams, with the current densities up to 340 A/cm2, were obtained. This class of CFA cathode may offer the promising prospect of high-current electron beam sources.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Physics and Astronomy (General)
Authors
Limin Li, Lie Liu, Qifu Xu, Lei Chang, Hong Wan, Jianchun Wen,