强流束流偏角探测器模拟与测试

庞健; 何小中; 代志勇; 李勤; 赵良超; 马超凡

doi:doi:10.11884/hplpb201426.045103

强激光与粒子束, 2014, 26 (4): 045103, 网络出版: 2014-04-24

强流束流偏角探测器模拟与测试

Simulation and test of beam angle monitor for pulsed high current

论文大纲

庞健 ^*何小中代志勇李勤赵良超马超凡

作者单位

中国工程物理研究院流体物理研究所, 脉冲功率科学与技术重点实验室, 四川绵阳 621900

轴向B-dot 束流偏角测量模拟计算标定平台 axial B-dot beam deflection angle measurement simulation calibration stand

摘要

基于束流横向偏角与束流产生轴向磁场成正比的原理，设计了环状PCB结构的轴向B-dot探头，用于直接测量束流偏角。设计并搭建了标定平台对探头进行了测试，同时利用CST MWS程序对探头进行了建模计算。计算结果与实验结果一致，表明了轴向B-dot探头可直接应用于束流偏角测量。分析了影响探头频率适用范围的原因，并根据模拟计算结果给出了改进措施。该探测器在标定平台输入上升时间130 ns，半高宽160 ns的高压信号时，探头对偏角信号的响应灵敏度为314 mV/(kA·mrad)。

Abstract

Beam monitors sensitive to the beam’s azimuthal B-dot field (sometimes referred as B-dots) are widely used to measure the displacement of beam centroid, as the beam generates a dipole term of the azimuthal magnetic field. Basing on the principle of the proportionality between the deflection angle and the difference of axial B field between the axially symmetrical positions, the axial B-dot probe has a potential use for beam deflection angle measurement. A calibration stand was built to test and improve the beam angle monitor, which was fabricated as a PCB structure. Meanwhile, simulations using the CST MWS codes were performed, demonstrating a good agreement with test results and giving some advices to suppress the disturbance of position deviation of the beam. Both the simulations and the experiments show that the axial B-dot monitor can be successfully used to measure the beam tilt directly.

参考文献

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庞健, 何小中, 代志勇, 李勤, 赵良超, 马超凡. 强流束流偏角探测器模拟与测试[J]. 强激光与粒子束, 2014, 26(4): 045103. Pang Jian, He Xiaozhong, Dai Zhiyong, Li Qin, Zhao Liangchao, Ma Chaofan. Simulation and test of beam angle monitor for pulsed high current[J]. High Power Laser and Particle Beams, 2014, 26(4): 045103.

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