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介绍在L波段强流相对论速调管研究中,强流相对论短脉冲空心电子束的产生、传输、束流调制及其诊断等方面的初步实验研究情况。在直线感应加速器上,利用φ66mm、壁厚3mm的石墨空心阴极,加上约5kGs的准直流引导磁场,引出了约500kV、4.5kA、脉宽100ns、φ54.5mm、厚度4.5mm的空心电子束。注入500kW的微波调制,束流经过输入腔后,得到了约6％的最大基波电流调制深度,经过中间腔后,得到了约23％的基波电流调制深度。
Introduced in the L band intense relativistic klystron research, strong relativistic short pulse hollow electron beam generation, transmission, beam modulation and the diagnosis of the initial experimental research. On a linear induction accelerator, a hollow hollow cathode with a diameter of 66 mm and a wall thickness of 3 mm and a collimated guiding magnetic field of about 5 kGs were used to extract a hollow electron beam of about 500 kV, 4.5 kA, a pulse width of 100 ns, a φ54.5 mm and a thickness of 4.5 mm . A 500kW microwave modulation was injected. After the beam passed through the input cavity, a maximum fundamental current modulation depth of about 6% was obtained. After passing through the intermediate cavity, about 23% of the fundamental current modulation depth was obtained.