Longitudinal Schottky spectra of a bunched Ne10＋ ion beam at the CSRe

• Published in: 中国物理C：英文版 no. 10; pp. 94 - 98
• Main Author: 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
• Format: Journal Article
• Language: English
• Published: 01.10.2013
• Subjects: 冷却储存环; 噪声信号; 无线电频率; 核物理实验; 激光冷却; 电子冷却; 肖特基; 重离子束
• ISSN: 1674-1137; 0254-3052
• DOI: 10.1088/1674-1137/37/10/107005

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.