120MeV电子直线加速器束流准直研究  

Research on beam-base alignment for 120MeV electron linear accelerator

作　　者：孙彬 王煜 黑东炜 李斌康 谭新建 翁秀峰 刘军 张小东 付竹明 SUN Bin;WANG Yu;HEI Dongwei;LI Binkang;TAN Xinjian;WENG Xiufeng;LIU Jun;ZHANG Xiaodong;FU Zhuming(State Key Laboratory of Intense Pulsed Radiation Simulation and Effect,Northwest Institute of Nuclear Technology,Xi'an 710024,China)

机构地区：[1]西北核技术研究院强脉冲辐射环境模拟与效应国家重点实验室,西安710024

出　　处：《核技术》2020年第6期69-74,共6页Nuclear Techniques

基　　金：国家自然科学基金(No.11375145)资助。

摘　　要：120 MeV电子直线加速器对于束流发射度有较高的要求,传统的光学准直难以满足需求。本文研究采用基于在线束流准直方法(Beam Based Alignment,BBA)以实现精度更高的准直,获得更好的束流性能。根据加速器结构配置情况,使用消色散校正法(Dispersion-free Steering Algorithm,DFS),对加速器束流匹配传输段在不同束流抖动情况下进行模拟计算。计算结果表明,DFS算法对于120 MeV电子直线加速器装置的束流准直应用效果良好。[Background] 120 MeV electron linear accelerator has high requirement for beam emittance, and the traditional optical collimation cannot meet the requirement. [Purpose] This study aims to use beam-based alignment(BBA) method to achieve higher precision collimation and obtain better beam quality. [Methods] According to the configuration of 120 MeV electron linear accelerator, all of beam position monitor(BPM) measurement data of the corresponding position under different energy were collected, then, the dispersion-free steering(DFS) algorithm was used to simulate the correction of accelerator matching transmission section in different beam jitter conditions.[Results] The simulation results indicate that the algorithm can minimize the transverse offset of quadrupole to50 μm. [Conclusions] The DFS algorithm can reduce the trajectory distortion in the low beam jitter accelerator.

关 键 词：束流准直 直线加速器 消色散校正法 束流抖动 轨道校正 

分 类 号：TL53[核科学技术—核技术及应用]