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Summary of CSC Validation at FNAL Production SiteA

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Validation tests of CSC production siteA at FNAL include HV scan, gas gain uniformity, dead channels check, wire groups efficiency, noise rate, and gas gain non-uniformity measurements with Cs137 source and Cosmic Rays. Results show good parameters with minimal surprises, uniform gas gain, and low noise rates.

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Summary of CSC Validation at FNAL Production SiteA

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  1. SUMMARY of CSC VALIDATION at FNAL Production SiteA. Petrunin, Y. Pischalnikov, N.TerentievPNPI UCLA CMU FNAL:G. Apollinari , O. Prokofiev CMU: N. Bondar, N. Terentiev,UCLA: Y. Pischalnikov, PNPI: A. Petrunin, V. Sulimov Purdue:A.Bujak, G.Zilizi, L.Gutay

  2. CSC VALIDATION Tests • 1. HV scan of all 6 planes with/without Cs137 (dark&source currents) (checked at MP9) • 2. Gas gain uniformity with Cs137 source (HV=3700V) • 3. ZERO DEAD channels (checked at MP9) • 4. Anode wire groups (64group/plane) efficiency • 5. Single wire (group) noise rate (TDC) • 6. Gas gain non-uniformity with Cosmic Rays measurements (CFEB) Nikolai’s Anode Analysis Webpage http://www-hep.phys.cmu.edu/cms/valid/test.html

  3. 2. Gas gain uniformity measurementswith Cs137 source (HV=3700V). Chamber Configuration to Measure Gas Gain Uniformity With Cs137 (ICs from cathodes) Strip’s#10 Strip’s#1 Wire’s#1 Wire’s#8 480 points/CSC 80 points/layer

  4. GAS Gain UniformityCs137 measurements

  5. Gas Gain Uniformity

  6. 4. Anode wire groups (64group/layer) efficiency measurements

  7. Cs137 .vs. Anode eff.50%

  8. Anode Noise

  9. Computer Control Cs137 scanvs.manual Cs137 scan

  10. Summaryfor 9 CSC validated at LAB7 • Overall parameters of 9 CSC “good” • no big surprises. • Gas Gain Uniformity (with Cs137) for 9 CSC • 6 CSC Gmax/Gmin < 3 • 3 CSC Gmax/Gmin < 3 • Layer#1 mainly contributed into several small “hot gain spots” • Anode noise rate for all 9 CSC less than 25 Hz.

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