Production and the quality control for the CMS endcap RPCs

Z Aftab,Ijaz Ahmed,Sunghoon Ahn,S A Akimenko,P S Anan,M I Asghar,S Y Bahk,A H Ball, Y Ban,Jiaxing Cai,J P Chatelain,A Colaleo,I Crotty, Yuncheng Ge,B Hong, S H Hong,Hafeez R Hoorani,G Iaselli, Mark Ito, S Jonalegedda,M S Khan,T I Kang,Byung I Kim,Ho Chul Kim,Ji Young Kim,T J Kim, Young Jong Kim, D G Koo, Rongrong Kuo,Kyong Sei Lee,Shiuhang Lee, H M Liu,F Loddo,Mario Maggi, M Marcisosky, Andrey Marinov,Sang Ki Nam,S K Park, S J Qian,J T Rhee,Min Sang Ryu,Ajay Kumar Sharma, K S Sim, T Solaija, C J Stephen,Walter Van Doninck,Qijie Wang,William Whitaker, Zhonghua Xue,Yilin Ye, J J Ying

Nuclear Physics B - Proceedings Supplements（2006）

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摘要

The production for the endcap RPCs in the CMS experiment has entered a mature stage of the production stream. In this paper, the production facilities and the selection procedures of the qualified RPC gaps axe presented. The mass production and the quality control tests for the endcap RPCs have reached the maximum productivity. The yield to produce the qualified gaps is now above 80% of the qualified bakelite sheets provided by Italy. We also report an intensive aging study for the endcap RPCs performed by using a 200 mCi Cs-137 gamma-ray source. A few diagnostic methods to observe aging phenomena are discussed. The test result is equivalent to approximately 12 years of Compact Muon Solenoid (CMS) RPC operation.

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关键词

mass production,quality control

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