高亮度注入器电子枪研制

AN ELECTRON GUN FOR HIGH BRIGHTNESS FEL INJECTOR

摘要: 研制了自由电子激光高亮度注入器的高重复频率强流短脉冲电子枪,实测测电子枪脉冲流强5.8A,脉冲半宽度2.2ns,脉冲重复频率2.16MHz。由于电子枪使用阴栅组件,阴栅极间距仅0.2mm,脉冲电压很低就可触发,因此电子枪具有很高的重复频率。

Abstract: The design and performance of an electron gun with high repetition rate, intensive beam current for CIAE-FEL injector is presented in this paper.Tested re- sults are as follows: pulse beam current is 5.8A, pulse width(FWHM)is 2.2ns andpulse repetition rate is 2.16MHz.In ordet to lower the trigger pulse voltage and make it oper- ate at the high repetition rate,the cathode-grid assembly a with distance of O.lSmm between cathode and grid was used.