Nondestructive beam energy-spread monitor using multi-strip-line electrodes
Nondestructive beam energy-spread monitor using multi-strip-line electrodes
复制标题
使用多带线电极的无损光束能量扩散监测器
DOI：
10.1103/physrevstab.6.032801
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
Kazuro Furukawa
中科院分区：
文献类型：
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作者：
T. Suwada;M. Satoh;Kazuro Furukawa
新开发了一种使用多带线电极的无损束能量扩散监测器，用于测量和控制 KEKB 注入器直线加速器中束流能量为 1.7 GeV 的 $180\ifmmode^\circ\else\text Degree\fi{}$ 电弧下单束电子束的能量扩散。基于带电束产生的电磁场的多极矩分析描述了检测原理。进行了原理验证实验来验证分析。结果表明，考虑到多极矩分析得出的二阶矩，分析的横向束宽与屏幕监视器测量的一致，对于电荷为能量扩散最小值的 rf 相位处分别为 0.9 和 $8\text{ }\text{ }\mathrm{nC}/\mathrm{bunch}$。在本报告中，我们详细描述了使用光束能量扩散监视器以及理论多极矩分析的实验结果。
A nondestructive beam energy-spread monitor using multi-strip-line electrodes has been newly developed in order to measure and control the energy spread of a single-bunch electron beam at an $180\ifmmode^\circ\else\textdegree\fi{}$ arc with a beam energy of 1.7 GeV in the KEKB injector linac. The detection principle is described based on a multipole-moment analysis of an electromagnetic field generated by a charged beam. A proof-of-principle experiment was performed to verify the analysis. The result shows that taking into account the second-order moment derived from the multipole-moment analysis, the analyzed transverse beamwidths are consistent with those measured by a screen monitor, and the energy spreads are estimated to be $0.150%\ifmmode\pm\else\textpm\fi{}0.007%$ and $0.264%\ifmmode\pm\else\textpm\fi{}0.004%$ for electron beams with charges of 0.9 and $8\text{ }\text{ }\mathrm{nC}/\mathrm{bunch}$ at the rf phase of the energy-spread minimum, respectively. In this report we describe in detail the experimental result using the beam energy-spread monitor along with a theoretical multipole-moment analysis.