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Michigan B184 Update Sept 3, 2004 |
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1) Chambers passing CR test a) Chambers passing CR test this week: EMS5A04, EMS4C12 b) Total number of chambers passing CR test at CERN: 55 2) Chambers in progress EMS4C04: Retake CR data EML4A13: Performing mezz card HV on scan EML3A01: Performing mezz card HV on scan EML5A03: Dark current test 3) Chambers in hospital. EMS5AC02: There are leaks at the rate of 10^-5 level in the location between Al ring and endplug of the bottom multilayer (ML1). The long term leak rate is about 2 mbar/day for Ar at 3 bar. Short term is about 7mbar/day for helium at 3 bar. We are applying epoxy to the leak location, as we did before. 4) Problems and other issues a) We have run out of the Al strips used to connect the kinematic mount and the FC. We will have to make note and add them in the future. b) The fourth DAQ system for CR test is working. This will help speed up our work. c) We started working with EML5 chambers. We now start to reduce UM space to make room for UW to set up first one more station, then two more. We will have total four stations left for EML5 chambers. Zhengguo Zhao