利用交变极性聚焦磁场抑制束质心的Corkscrew运动  

Confining corkscrew oscillations by using an alternate solenoid field

作　　者：石金水[1] 李勤[1] 禹海军[1] 马冰[1] 林郁正[2] 丁伯南[3] 

机构地区：[1]中国工程物理研究院流体物理研究所,绵阳621900 [2]清华大学工程物理系,北京100084 [3]中国工程物理研究院,绵阳621900

出　　处：《核技术》2003年第3期202-206,共5页Nuclear Techniques

摘　　要：对强流相对论电子束采用交变极性聚焦磁场聚焦存在稳定解,只要电子束的能量大于一定值,且合理设置聚焦布局,可达到稳定解所要求的条件。数值计算结果表明,在采用交变周期为0.81m、峰值磁场设为0.2T的情况下,对于能量为11.2 MeV的电子束,当聚焦布局长度为2.5m时,束质心位移从5mm (始端) 被抑制至趋近于0 (终端)。实验时,采用了数值计算相近的聚焦布局,所获得的实验结果与计算结果基本一致。This paper describes the precondition of transporting stably intense beams in an alternate focusing solenoid field and presents the method of confining corkscrew oscillations by the field. The results of numerical calculation show that the centroid transverse displacement is decreased from 5mm (at the outset) to approximate 0 (at the terminal) when the 0.81m alternating period and the 0.2T peak magnetic field are used and 11.2MeV beams are transported 2.5m. The experimental setup whose layout is similar to that of numerical calculation is established and the experimental results are almost in agreement with the results of numerical calculation.

关 键 词：交变极性聚焦 稳定解 束质心 CORKSCREW运动 强流相对论电子束 电子运动 磁场 

分 类 号：TL501.2[核科学技术—核技术及应用]