Longitudinal Schottky spectra of a bunched Ne^(10+) ion beam at the CSRe  

作　　者：汶伟强 马新文 张大成 朱小龙 孟令杰 李杰 刘惠萍 赵冬梅 王之帅 毛瑞士 赵铁成 武军霞 马晓明 晏太来 李国宏 杨晓东 刘勇 杨建成 原有进 夏佳文 徐瑚珊 肖国青 赵红卫 

机构地区：[1]Institute of Modern Physics,Chinese Academy of Sciences [2]University of Chinese Academy of Sciences

出　　处：《Chinese Physics C》2013年第10期94-98,共5页中国物理C（英文版）

基　　金：National Natural Science Foundation of China (10921504)

摘　　要：The longitudinal Schottky spectra of a radio-frequency （RF） bunched and electron cooled 22Ne1~＋ ion beam at 70 MeV/u have been studied by a newly installed resonant Schottky pick-up at the experimental cooler storage ring （CSRe）, at IMP. For an RF-bunched ion beam, a longitudinal momentum spread of Ap/p=l.6~lO-5 has been reached with less than 107 stored ions. The reduction of momentum spread compared with a coasting ion beam was observed from Schottky noise signal of the bunched ion beam. In order to prepare the future laser cooling experiment at the CSRe, the RF-bunching power was modulated at 25th, 50th and 75TM harmonic of the revolution frequency, effective bunching amplitudes were extracted from the Schottky spectrum analysis. Applications of Schottky noise for measuring beam lifetime with ultra-low intensity of ion beams are presented, and it is relevant to upcoming experiments on laser cooling of relativistic heavy ion beams and nuclear physics at the CSRe.The longitudinal Schottky spectra of a radio-frequency （RF） bunched and electron cooled 22Ne1~＋ ion beam at 70 MeV/u have been studied by a newly installed resonant Schottky pick-up at the experimental cooler storage ring （CSRe）, at IMP. For an RF-bunched ion beam, a longitudinal momentum spread of Ap/p=l.6~lO-5 has been reached with less than 107 stored ions. The reduction of momentum spread compared with a coasting ion beam was observed from Schottky noise signal of the bunched ion beam. In order to prepare the future laser cooling experiment at the CSRe, the RF-bunching power was modulated at 25th, 50th and 75TM harmonic of the revolution frequency, effective bunching amplitudes were extracted from the Schottky spectrum analysis. Applications of Schottky noise for measuring beam lifetime with ultra-low intensity of ion beams are presented, and it is relevant to upcoming experiments on laser cooling of relativistic heavy ion beams and nuclear physics at the CSRe.

关 键 词：storage ring Schottky spectrum RF-buncher electron cooling 

分 类 号：TL594[核科学技术—核技术及应用]