重离子储存环CSRe上激光冷却相对论能量类锂12C3+离子束的实验研究

项目名称： 重离子储存环CSRe上激光冷却相对论能量类锂12C3+离子束的实验研究

项目编号： No.11504388

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 汶伟强

作者单位： 中国科学院近代物理研究所

项目金额： 24万元

中文摘要： 激光冷却储存环中相对论能量的重离子束是最有希望得到高相空间密度离子束、实现离子束相变并且获得有序束和晶化束的一种方法。相对于已经比较成熟的随机冷却和电子冷却技术，储存环上重离子束的激光冷却可以将离子束冷却到极低温度（mK），并且可以在激光冷却过程中开展高电荷态离子的精细激光谱学研究。为了研究在储存环上利用一束激光结合射频聚束器RF-buncher对大范围动量展宽相对论能量的离子束实现冷却，本项目拟在中科院近代物理研究所的重离子冷却储存环CSRe上利用一束257nm的连续激光开展激光冷却能量为122MeV/u的类锂12C3+离子束实验，获得纵向动量展宽小于1×10^-6的超冷离子束，结合CSRe上的单离子响应的共振Schottky谱仪和紫外响应的荧光探测系统开展超冷离子束动力学研究。

中文关键词： 激光冷却；高电荷态离子；重离子储存环；束流动力学；晶化束

英文摘要： Laser cooling is one of the most promising techniques to reach high phase-space densities and achieve phase transition, ordered even crystalline beam for relativistic heavy ion beams at storage rings. Compared with the established cooling schemes at storage rings, such as stochastic cooling and electron cooling, laser cooling can provide the ultra-low temperature (mK) ion beams, and the precision laser spectroscopy of the highly charged ions can be performed simultaneously during the laser cooling experiments. In order to study laser cooling of broad momentum spread ion beams by combining a cw laser system and a RF-buncher at storage rings, we propose to perform the laser cooling of relativistic 122MeV/u Li-like 12C3+ ion beams by a cw laser system at the experimental cooler storage ring CSRe in the Institute of Modern Phyics, Chinese Academy of Sciences. Based on the laser cooling experiment, the ultra-cold ion beams with longitudinal momentum spread less than 1×10^-6 will be obtained, the dynamics of these ultra-cold ion beams will be studied systematically by using the one ion sensitive resonant Schottky spectrometry and ultraviolet sensitive fluorescence detection system.

英文关键词： Laser cooling;Highly charged ion;Heavy ion storage ring;Beam dynamics;Crystalline beams