摘要
在长脉冲(50～100ns)和短脉冲(3ns)条件下,我们对天鹅绒阴极的发射性能进行了实验研究。其阴极电流密度分别为400A/cm^2和7kA/cm^2。 我们分别测量了电流-电压曲线,使用Cherenkov效应得到了阴极发射图象,得到了天鹅绒纤维的扫描电镜照片并测量了天鹅绒阴极的实验结构。在此基础上讨论了天鹅绒阴极的发射机理。
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.
出处
《强激光与粒子束》
EI
CAS
CSCD
1992年第1期107-113,共7页
High Power Laser and Particle Beams
