摘要
介绍了利用HVG-1二极管产生的强流短脉冲电子束源,开展短脉冲重复频率为100Hz的S波段相对论速调管放大器(RKA)实验研究.利用无箔空心石墨阴极和0.82T的恒流源引导磁场,引出了电压约700kV、电流约6.5kA、脉宽(半高宽)25ns的环形电子束.该电子束经过输入腔和中间腔的调制后,得到了5kA/22ns的基波调制电流.经过输出腔后,得到了大于1GW/20ns的辐射微波,频率2.95GHz,平均功率2.4kW,效率约24%,增益34dB.没有观察到限制该GW级功率水平的S波段RKA的因素.
The operation of a repetitively pulsed relativistic klystron amplifier at 100Hz has been reported. The electron beam was reproducibly modulated to 〉74%. Using a 700kV, 6.5kA, 25ns electron beam and a 500kW Magnetron as inputs, we extracted 1.2GW radiation power in 20ns FWHM pulses at 2.95GHz. The average power is 2.4kW. The efficiency is 24%, and the gain is about 34dB. Limitations attributing directly to the repetitive pulsing at these levels have not been observed.
出处
《高能物理与核物理》
CSCD
北大核心
2007年第3期288-291,共4页
High Energy Physics and Nuclear Physics
基金
国家高技术研究发展计划激光技术领域基金(863-803-4-3)资助~~
关键词
相对论速调管放大器
短脉冲电子束
高功率微波
重复频率运行
relativistic klystron amplifier, short pulse electron beam, high power microwave, repetitive operation