Physical design of a pulsed kicker for low energy proton beams
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摘要: 电子回旋共振(ECR)质子源产生的脉冲质子束脉宽通常在ms或亚ms量级，高梯度加速结构要求注入的质子束脉宽为100 ns或更短，需要一个脉冲踢束器将大部分不需要的束流踢开，留下所需的短脉冲质子束。设计的踢束器采用静电偏转方法，针对在研ECR质子源的束流参数，设计了脉冲踢束器的结构尺寸，使用ANSYS软件计算了踢束器的静电场分布情况，利用软件内置的CMATRIX宏提取了结构电容的数据，给出了对脉冲踢束电源的参数要求，讨论了踢束脉冲上升沿和产生的束流脉冲上升沿的对应关系。Abstract: The shortest pulse width of ECR proton source is about sub-millisecond. A chopper or a kicker is important to produce 100 ns pulsed proton beams for high gradient accelerating structure. Physical design of an electrostatic kicker was described in this paper. The configuration of the kicker was matched with an ECR proton source which was being investigated. Electrostatic field was calculated with ANSYS. The capacitance of the kicker was extracted with CMATRIX command macro. Relations between beams rising time and kicker pulses rising time were discussed. The desire for pulsed power supply was also analyzed.
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