کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1865810 | 1530626 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Propagation of individual plasma spots on cathode surface by high-current discharge process
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 373, Issues 12â13, 16 March 2009, Pages 1165-1169
Journal: Physics Letters A - Volume 373, Issues 12â13, 16 March 2009, Pages 1165-1169
نویسندگان
Limin Li, Lie Liu, Qifu Xu, Lei Chang, Hong Wan, Jianchun Wen,