| 强流束流偏角探测器模拟与测试 |
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| 引用本文： | 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): 045103-328. DOI: 10.11884/HPLPB201426.045103 |
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| 作者姓名： | 庞健 何小中 代志勇 李勤 赵良超 马超凡 |
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| 作者单位： | 1.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 621 900 |
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| 基金项目： | 国家自然科学基金项目(11175166) |
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| 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130ns,半高宽160ns的高压信号时,探头对偏角信号的响应灵敏度为314mV/(kA·mrad)。
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| 关 键 词： | 轴向B-dot 束流偏角测量 模拟计算 标定平台 |
| 收稿时间： | 2013-09-05 |
Simulation and test of beam angle monitor for pulsed high current |
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| Affiliation: | 1.Key Laboratory of Pulsed Power,Institute of Fluid Physics,CAEP,P.O.Box 919-108,Mianyang 621900,China |
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| Abstract: | Beam monitors sensitive to the beams 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. |
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| Keywords: | axial B-dot beam deflection angle measurement simulation calibration stand |
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