多腔微波电子枪聚束腔作用分析
Function of bunching segment in multi-cell RF gun
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摘要: 分析了聚束腔中电场分布及电子的运动过程，使用RUNGEKUTTA法求出不同腔长时电子的俘获相位及不同初始相位电子的运动轨迹，讨论了加聚束段对减小电子反轰的作用。研制的4+1/2腔RF-gun使用首腔和第二加速腔作为聚束段，取得了高占空因子，较高束流功率的实验结果。Abstract: With a bunching segment and a shortened first cell, the 4+1/2 cell RF gun produced in CAEP has been proved experimentally to be effective in reducing electron back bombardment. The analysis of the electric field distribution and electron motion in bunching segment of multi cell RF gun is presented in this paper. The electron capture efficiency and electron trajectory with different initial phase are calculated using Runge-Kutta method. The function of the bunching segment is discussed. The calculated parameters of the 4+1/2 cell RF gun agree well with the experimental results.
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Key words:
- rf-gun /
- bunchin gsegment /
- electron back bombardment
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