Test of BESⅢ RPC in the avalanche mode

• Published in: Chinese physics C Vol. 32; no. 5; pp. 373 - 376
• Main Author: 韩纪锋 张家文 陈进 张清民 刘倩 谢宇广 钱森 马烈华
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.05.2008; Institute of High Energy Physics,CAS,Beijing 100049,China; Graduate University of Chinese Academy of Sciences,Beijing 100049,China%Institute of High Energy Physics,CAS,Beijing 100049,China
• Subjects: BES; RPC系统; 宇宙射线; 气体混合; 雪崩模式; resistive plate chamber (RPC); BES; avalanche mode
• ISSN: 1674-1137; 0254-3052; 2058-6132
• DOI: 10.1088/1674-1137/32/5/009

The installation of the BESⅢ RPC system has been completed. Cosmic ray test results show that they perform very well in streamer mode and meet the BESⅢ requirements. We have tested several RPCs in the avalanche mode with the addition of extra SF6 in the gas mixture. We find an efficiency plateau that reaches -95%, and a time resolution of 1.8 ns. This demonstrates that the BESⅢ-type RPC can work in the avalanche mode as well.