Nuclear Techniques ›› 2014, Vol. 37 ›› Issue (05): 50101-050101.

• SYNCHROTRON RADIATION TECHNOLOGY AND APPLICATIONS •

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

ZHAO Guobi LENG Yongbin YUAN Renxian CHEN Zhichu ZHOU Weimin

1. (Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China)
• Received:2014-03-21 Revised:2014-04-17 Online:2014-05-10 Published:2014-05-08

Abstract:

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?C in some cases, and hence further studies are needed to reduce the risk of instrument damage.