同步加速器束流能量自动切换控制系统  

Control System of Automatic Beam Energy Variation for Synchrotron

作　　者：刘伍丰[1] 乔卫民[2] 敬岚[2] 刘相满 何前磊 LIU Wufeng;QIAO Weimin;JING Lan;LIU Xiangman;HE Qianlei(College of Electrical Engineering,Henan University of Technology,Zhengzhou 450001,China;Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China)

机构地区：[1]河南工业大学电气工程学院,河南郑州450001 [2]中国科学院近代物理研究所,甘肃兰州730000

出　　处：《原子能科学技术》2019年第4期747-753,共7页Atomic Energy Science and Technology

基　　金：河南省科技厅科技攻关项目资助(172102210028);河南省高等学校重点科研项目资助(17A490001);河南省高等学校青年骨干教师资助项目(2016GGJS-066);河南工业大学校青年骨干教师培养计划资助项目(2015008);国家留学基金资助项目(201709895005)

摘　　要：带电粒子放射治疗中3D主动治疗方式需要不同的束流能量照射不同的病灶切面,这就需要同步加速器控制系统能实现多级束流能量的自动切换控制并提供接口对接治疗计划进行自动变能控制。本文开发了同步加速器束流能量切换控制系统,同步加速器的前端服务器中存储着执行1个同步加速器加速周期所需的全部控制数据集,其中控制数据通过索引标号对其进行区分,同步事例信息是同步加速器多级束流能量切换的触发信号。当前端控制器被同步时间系统的同步事例触发激活后,从DSP波形发生器的SDRAM空间中读出磁铁电源、高频等控制数据进行数据切换。同步事例信号包含同步触发信息、束流能量控制数据的索引信息和控制数据的更新操作信息。多级束流能量自动切换控制系统能实现255级束流能量间自动切换控制(碳束能量在50～500 MeV间切换,步长可控制在1.77 MeV),完全能满足实际中碳束能量在50～500 MeV间以10 MeV为步长的自动切换控制。3D irradiation of charged particle radiotherapy with pencil beam scanning needs different beam energy for irradiating slices of tumor.This requires that the synchrotron control system can realize the automatic switch control of multi-stage beam energy and provide the interface docking treatment plan for automatic control.Control system of automatic beam energy variation for synchrotron was developed.All control data of one accelerator control cycle time were stored in the front-end servers of synchrotron control system.Control data have unique index number to distinguish them.Synchronous timing event is the trigger signal of the synchrotron multi-stage beam energy switch.When the front-end controller receives synchronous timing event from synchronous timing system,the control system of automatic beam energy variation for synchrotron can read data from SDRAM of the controller to generate control signals for power supply of magnet,RF device,etc.The synchronous timing event signal contains synchronous trigger information,index number of control data for beam energy variation and notice of updating control data.The control system of automatic beam energy variation for synchrotron can realize 255 different stages of beam energy automatic variation control by steps of 1.77 MeV with 12 C beam energy from 50 MeV to 500 MeV,and it can totally control the accelerator to change 12 C beam energy from 50 MeV to 500 MeV by steps of 10 MeV.

关 键 词：同步加速器控制系统 束流能量自动切换 同步事例 ARM控制器 DSP波形发生器 

分 类 号：TL503.6[核科学技术—核技术及应用] TP23[自动化与计算机技术—检测技术与自动化装置]