Design of an RF Photo-Gun (PHIN)
Design of an RF Photo-Gun (PHIN)
复制标题
射频光电枪 (PHIN) 的设计
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
B. Mercier
中科院分区：
文献类型：
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作者：
R. Roux;G. Bienvenu;C. Prévost;B. Mercier
在本说明中，我们展示了使用 2-D 电磁代码 SUPERFISH 和 3-D 代码 HFSS 执行的 RF 仿真结果，这使我们能够获得主要特性，例如腔尺寸和轴向场分布。第二部分总结了使用 PARMELA 代码对枪中光束动力学的模拟。我们还提供了一些梁负载的计算，即梁本身在枪内感应的电压，这会严重限制枪的性能。此外，真空方面已得到彻底研究，因为在欧洲核子研究中心之前使用射频光注入器进行的实验中，发现压力在提取电荷水平较高（约 1 µC）时急剧增加。
In this note we show the results of the RF simulations performed with a 2-D electromagnetic code, SUPERFISH, and a 3-D code, HFSS, which allowed us to obtain the main characteristics such as the cavity dimensions and the axial field distribution. In the second part, simulations of the beam dynamics in the gun with the PARMELA code are summarised. We provide also some calculations of the beam-loading, i.e. the voltage induced by the beam itself inside the gun, which can severely limit the gun performance. In addition, vacuum aspects have been thoroughly investigated as, in previous experiments with RF photoinjectors at CERN the pressure has been found to increase dramatically at high levels of extracted charge (≈1 µC).