实验环Betatron振荡随机冷却的模拟  

Simulation of Betatron Stochastic Cooling on Experimental Cooling Storage Ring

作　　者：胡雪静[1,2] 原有进[1] 

机构地区：[1]中国科学院近代物理研究所,兰州730000 [2]中国科学院大学,北京100049

出　　处：《原子核物理评论》2015年第3期296-300,共5页Nuclear Physics Review

基　　金：国家自然科学基金创新研究群体(11221064);国家重点基础研究发展计划项目(973计划)(2014CB845500)~~

摘　　要：随机冷却是一种基于带宽反馈系统对束流振荡进行衰减的冷却方法,更适合冷却较大发射度和动量分散的次级粒子束,与电子冷却互补,可以得到更高品质的束流。兰州重离子研究装置(HIRFL)目前处于冷却存储环的实验环随机冷却系统的设计和建造阶段。通过对横向Betatron振荡的模拟,得到了提高系统带宽、增加探测器(Pick-up)和冲击器(Kicker)的个数、降低系统噪声温度等对缩短冷却时间和减小冷却平衡值的重要作用。同时,分析了较大的动量分散或较大的放大器增益对Betatron振荡冷却过程产生的加热现象。Stochastic cooling, based on a feedback system, aims at damping the oscillation of particles. Stochastic cooling is more suitable to cool secondary beam with larger size and momentum spread, and it is therefore can be complemented with electron cooling, in order to obtain beam of higher quality. Stochastic cooling system is being designed and constructed on the experimental Cooling Storage Ring of HIRFL. By simulation of Betatron stochastic cooling, it is obtained that the importance for shortening the cooling time and reducing cooling equilibrium by improving bandwidth, increasing the numbers of pickup and kicker, and decreasing the system noises. Meanwhile, the heating during the cooling process caused by larger momentum spread or larger gain of amplifier is analyzed.

关 键 词：随机冷却 Betatron振荡 冷却时间 冷却平衡值 

分 类 号：O572.211[理学—粒子物理与原子核物理]