HIRFL-CSR电子冷却束流位置测量系统

A Beam Position Monitor System for Electron Cooler in HIRFL-CSR

高效率的电子冷却过程,要求电子束与离子束位置平行且重叠。为了同时测量电子束与离子束的位置,在HIRFL-CSR电子冷却装置上研发了以容性圆筒形极板为感应电极的束流位置探测系统。系统测量束流通过探针时产生的脉冲感应信号,并进行傅里叶变换得到频谱信号,分析4个不同电极上频谱信号强度获取束流的位置信息。测量结果表明,该束流位置探测系统测量准确,为定量研究储存环离子累积和电子冷却过程与两种束流相对位置及角度的依赖关系提供了条件。

The efficient electron cooling requires that the ion beam and electron beam are parallel and overlapped.In order to measure the positions of ion beam and electron beam simultaneously,a beam position monitor system is developed for the HIRFL-CSR electron cooler device,which probe consists of four capacitive cylinder linear-cut poles.One can get the both beam positions from the picking up signals of four poles by using Fourier transform（FFT） method.The measurement results show that the beam position monitor system is accurate.This system is suitable for investigating the relation between electron cooling processing and the angle of ion beam and electron beam.