上海光源BPM纽扣电极束流负载热形变仿真分析  

Analysis of thermal deformation simulation of the BPM in SSRF storage ring

作　　者：赵国璧[1] 冷用斌[1] 袁任贤[1] 陈之初[1] 周伟民[1] 

机构地区：[1]中国科学院上海应用物理研究所嘉定园区,上海201800

出　　处：《核技术》2014年第5期1-6,共6页Nuclear Techniques

基　　金：国家自然科学基金(No.11375255)资助

摘　　要：纽扣电极型探头主要用于束流横向位置测量,在拾取束流信号的同时会存在发热形变问题,有可能引入额外的系统测量误差,极端情况下甚至会导致设备损坏,在强流电子储存环的设计和运行中对此问题需要加以研究。介绍了上海光源储存环纽扣电极的束流负载热效应的分析建模方法,对不同束流流强、不同填充模式下的电极发热问题进行了ANASYS仿真分析。结果表明,在上海光源所有设计运行模式下,电极因束流负载引起的发热形变均小于加工公差,对位置测量的影响可基本忽略,但极端情况下探头内的温度可达270°C,存在一定的设备损坏风险,需要提出相应对策。Background： The measurement resolution of the button-type beam position monitor （BPM） pickups could be affected by the heat and deformation due to the beam load and the probes might even malfunction in extreme situations. Purpose： This effect becomes more critical in storage rings under high current conditions, which needs to be studied very carefully. Methods： This article introduces the modeling and analyzing method of the beam load effect of the BPM in Shanghai Synchrotron Radiation Facility （SSRF） and the simulations of the heating problem under various beam currents and filling patterns using ANASYS. Results： The results showed that the deformation due to the beam load operating at any designed modes in SSRF would not outstrip the manufacturing tolerance so that the effect to the position measurement could be neglected. Conclusion： Meanwhile, the temperature of some parts of the probe could be as high as 270 ℃ in some cases, and hence further studies are needed to reduce the risk of instrument damage.

关 键 词：上海光源(Shanghai SYNCHROTRON Radiation Facility SSRF) 束流位置测量 热形变 ANASYS 

分 类 号：TL506[核科学技术—核技术及应用]