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研究强流相对论性电子束(660kV,40kA,100ns)在中性气体氢(13—2600Pa)中传输时电流中和特性。实验发现:随着本底气体压强自低到高的过渡,电流中和效应先是由弱到强,继而由强到弱,当压强在133.3Pa左右,测得的最小电流中和比～15%。基于对束流传输时气体电离和带电粒子运动的分析所做的电流中和过程的数值模拟,较好地解释了实验结果,且对束流传输时内部的电流、电磁场和带电粒子密度分布等的变化作了相应研究。
The current neutralization characteristics of intense relativistic electron beams (660 kV, 40 kA, 100 ns) in neutral gas hydrogen (13-2600 Pa) were investigated. The experimental results show that with the transition from low to high gas pressure, the current neutralization effect is from weak to strong and then from strong to weak. When the pressure is about 133.3Pa, the minimum current neutralization ratio is ~ 15% . Based on the numerical simulation of the current neutralization process of gas ionization and charged particle motion during beam transmission, the experimental results are well explained, and the internal current, electromagnetic field and charged particle density distribution Made a corresponding study of changes.