光阴极微波电子枪优化设计的考虑

Consideration of Optimized Design for Photocathode RF Gun

摘要: 对光阴极微波电子枪进行了优化设计 ,给出了光阳极微波腔的形状、电参数和电场分布 .电子束团初始参数对束流横向发射度的影响 ,用 Parmela程序对其进行了优化 ,得到了一组最优参数 .考虑了补偿线圈对束流发射度的影响 ,对线圈的位置和电流的大小做了优化 .经过优化后得到腔出口处的横向发射度为 1 .39πmm.mrad,达到了设计时的要求. A 1.3 GHz photocathode RF gun is under study in peking University. The photocathode RF gun, composed of gun cavity, photocathode and Laser system, is expected to deliver a electron beam with a normalized transverse rms emittance of 1π mm·mrad at a charge of 1nC. Its performance has been studied by the space-charge tracking code PARMELA. The influences of the initialized electron beam were also studied. The emittance compensation technique is employed. After optimization of the parameters was...

Abstract: A 1.3 GHz photocathode RF gun is under study in peking University. The photocathode RF gun, composed of gun cavity, photocathode and Laser system, is expected to deliver a electron beam with a normalized transverse rms emittance of 1π mm·mrad at a charge of 1nC. Its performance has been studied by the space-charge tracking code PARMELA. The influences of the initialized electron beam were also studied. The emittance compensation technique is employed. After optimization of the parameters was...