电阻环束流探测器的标定
Improvement on the accuracy of beam bugs in linear induction accelerator
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摘要: 电阻环探测技术是一种成熟、实用的在线测试束流技术，它能给出束流的大小和束流质心的位置。在即将投入使用的20MeV直线感应加速器中，该技术将作为一种精确的束流诊断手段。为此设计了一套精密的束流模拟和电阻环标定装置，其束流位置的定位精度达到0.02mm，以之对精心设计的电阻环进行标定。标定的结果表明电阻环对束流质心位置的测试精度达到0.5mm，经标定后的束位置拟合值绝对误差不大于0.2mm。Abstract: In linear induction accelerator t he resistive wall monitors kown as “beam bugs” have been used as essential diagnostics of beam current and location. This paper presents a new method that can improve the accuracy of these beam bugs used for beam position measurements. With a fine beam simulation set, this method locates the beam position with an accuracy of 0.02mm and thus can scale the beam bugs very well. Experiment results prove that the precision of beam position measurements can reach submillimeter degree.
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Key words:
- linear induction accelerator /
- beam bugs /
- beam simulation /
- beam position
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