kHz repetition rate pulse power source based on tri-coaxial cable Blumlein lines driven by hydrogen thyratron
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摘要: 闪光X射线摄影技术在军事和民用等多个领域具有重要场景。针对重频直线感应加速器高重频的要求，提出了基于氢闸流管驱动三同轴电缆Blumlein线的脉冲功率源方案，设计和研制了一种三同轴电缆，研究了氢闸流管的导通特性，搭建了氢闸流管驱动三同轴电缆Blumlein线脉冲功率源的验证平台，开展了kHz重频脉冲功率源实验研究，以及kHz重频脉冲功率源驱动重频感应腔的实验研究，结果表明：基于氢闸流管驱动三同轴电缆Blumlein线脉冲功率源实现了波形品质优异的kHz重频方波脉冲输出。
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关键词:
- kHz重频 /
- 氢闸流管 /
- 三同轴电缆Blumlein线 /
- 脉冲功率源 /
- 直线感应加速器
Abstract: Flash X-ray photography technology has important scenarios in military and civil fields. According to the requirement of high repetition rate of the linear induction a ccelerator, we put foruarc a pulse power source scheme based on tri-coaxial cable Blumlein lines driven by hydrogen thyratron. A tri-coaxial cable was designed and developed. The conduction characteristics of hydrogen thyratron were studied. The verification setup for the pulse power source was built. The experimental research on kHz repetition rate pulse power source and kHz repetition rate pulse power source driving induction cavity was carried out. The results show that the tri-coaxial cable Blumlein lines pulse power source driven by hydrogen thyratron can realize the kHz repetition rate square wave output with excellent waveform quality. -
图 2 三同轴电缆Blumlein线电路示意图
Figure 2. Schematic diagram of circuit of tri-coaxial cable Blumlein line
图 4 三同轴电缆的静电场仿真和三维瞬态电磁场仿真输出
Figure 4. Electrostatic field simulation and output of three-dimensional instantaneous electromagnetic field simulation
图 5 1S1B和1S5B脉冲功率源输出波形
Figure 5. Output waveforms of the 1S1B and 1S5B pulse power sources
图 7 感应加速单元重频运行性能
Figure 7. Repetition rate operation performance of induction acceleration cell
表 1 氢闸流管技术指标
Table 1. Technical specifications of hydrogen thyratron
peak voltage/kV peak current/kA peak power/MW operating coefficient/(V·A·Hz) (di/dt)/(kA/μs) jitter/ns maximum design value 35 2 35 28×109 50 5 optimum experimental value 20 4 80 180×109 140 ＜1 
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表 2 氢闸流管驱动三同轴电缆Blumlein线输出的时间抖动
Table 2. Time jitter of the output of tri-coaxial cable Blumlein lines driven by the hydrogen thyratron
time interval ∆ti1/ns ∆ti2/ns 1# 143.6 164.4 2# 143.4 163.8 3# 143.9 164.1 4# 144.3 164.4 5# 142.7 163.3 6# 143.2 163.6 7# 144.8 163.4 8# 142.0 163.0 9# 142.3 164.1 10# 144.0 164.4 range jitter 2.8 1.4 RMS jitter 0.70 0.43
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