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Enhancing Pulse Height Spectra & Gain Variation in Triple-GEM Operation

Research findings from the 13th RD51 Collaboration Meeting on high-voltage connections and measurements in Triple-GEM structures at Saha Institute of Nuclear Physics. Investigating gain variations with different voltage levels and current.

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Enhancing Pulse Height Spectra & Gain Variation in Triple-GEM Operation

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  1. Triple GEM Operation RD51 Group Saha Institute of Nuclear Physics 14 February, 2014

  2. Triple-GEM Connection Cathode 0.1M 0.1M 0.1M 10M 2.2nF 2.2nF Drift (3mm) 1.0M HV Filter 10M GEM1 Transfer 1 (1mm) 0.55M 1.0M GEM2 Transfer 2 (2mm) 0.5M 10M 1.0M Induction (1mm) GEM3 10M 0.4375M Anode 1.0M 4 Readout Sectors Divider 13th RD51 Collaboration Meeting

  3. Voltage Current Tabulation

  4. High Voltage Divider Connection

  5. Pulse Height Spectra for 4 Readout Sectors HV = 4450 V Without RC filter 13th RD51 Collaboration Meeting

  6. Pulse Height Spectra For Different HV 4450 V 4550 V 4650 V 4750 V With RC filter 13th RD51 Collaboration Meeting

  7. Gain Variation with High Voltage (before RC filter) • Assumed that the voltage divider configurations are same in both the cases ! • No idea whether the HV in CMSGEM is before or after the RC filter ! 13th RD51 Collaboration Meeting

  8. Gain Variation with High Voltage (before RC filter) and Current

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