Time-and-space resolved measurements of the emission uniformity of carbon fibre cathode in high-current pulsed discharge

doi:10.1088/1674-1056/19/3/032902

Abstract The remaining challenges, confronting high-power microwave (HPM) sources and pulsed power generators, stimulate the developments of robust relativistic electron beam sources. This paper presents a carbon fibre cathode which is tested in a single pulsed power generator. The distribution and the development of cathode plasma are observed by time-and-space resolved diagnostics, and the uniformity of electron beam density is checked by taking x-ray images. A quasistationary behaviour of cathode plasma expansion is observed. It is found that the uniformity of the extracted electron beam is satisfactory in spite of individual plasma jets on the cathode surface. These results show that carbon fibre cathodes can provide a positive prospect for developing a high-quality electron beam.

Keywords: cold cathode emission uniformity x rays time-and-space resolved measurement

Received: 09 February 2009
Revised: 05 August 2009
Accepted manuscript online:

PACS:	52.80.-s	(Electric discharges)
	52.50.Dg	(Plasma sources)
	41.75.Ht	(Relativistic electron and positron beams)
	52.70.Kz	(Optical (ultraviolet, visible, infrared) measurements)
	29.25.Bx	(Electron sources)

Fund: Project supported by the National High Technology Research and Development Program of China.

Cite this article:

Liu Lie(刘列), Li Li-Min(李立民), Xu Qi-Fu(徐启福), Cheng Guo-Xin(程国新), and Chang Lei(苌磊) Time-and-space resolved measurements of the emission uniformity of carbon fibre cathode in high-current pulsed discharge 2010 Chin. Phys. B 19 032902

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Time-and-space resolved measurements of the emission uniformity of carbon fibre cathode in high-current pulsed discharge

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