EXPERIMENTAL RESEARCH OF VELVET CATHODES

Zhang Qi, Xing Da, Zhi Tianxianyi, et al. EXPERIMENTAL RESEARCH OF VELVET CATHODESJ. High Power Laser and Partical Beams, 1992, 4(01): 107-113.

Citation:

Zhang Qi, Xing Da, Zhi Tianxianyi, et al. EXPERIMENTAL RESEARCH OF VELVET CATHODESJ. High Power Laser and Partical Beams, 1992, 4(01): 107-113.

Citation:

Zhang Qi, Xing Da, Zhi Tianxianyi, et al. EXPERIMENTAL RESEARCH OF VELVET CATHODESJ. High Power Laser and Partical Beams, 1992, 4(01): 107-113.

Abstract

We have made some experiments to study the emission performance of velvet cathodes with long (120ns, 50ns) and short (3ns) pulses. The cathode current densities are 400 kA/cm² and 7kA/cm² respectively.
The voltage-current plot, cathode emission pattern, scanned electron microphotograph and the practical construction of velvet cathodes are presented.
Some ideas about emission mechanism of velvet cathodes have been suggested.

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