20min run peak sensing histograms

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Cathode Voltage Effect on the Peak sensing Spectrum

All the measurements have the same GEM voltage 2.87 kV, just cathode voltage changes.


Date CATH. Volatage (kV) Shutter source run number Notes
10/23 3.12 Open off 7899
10/16 3.12 Closed off 7900



GEM-2.87 kV CATH-3.435 kV

Date Shutter source run number Scaler counts (Hz) pedestal Integral in ADC full spectrum (Hz) Integral in ADC spectrum beyond pedestal (Hz) notes
10/16 Open off 7847 150+_7 1429/60 7915/60 5810/60
10/16 Closed off 7846 72+_3 1070/60 4029/60 2817/60
10/16 Open off 7848 137+_16 19 129 111 4runs 7848 62 63 64.png
10/16 Closed off 7862 53+_1 7 47 41
10 /16 Open On 7863 147+_12 30 129 101
10/16 Closed On 7864 67+_4 15 59 45
10/17 Open off 7865 132+_14 28 121 97 4runs 7865 66 68 67.png
10/17 Closed off 7866 95+_7 11 59 49
10 /17 Open On 7868 150+_6 32 128 100
10/17 Closed On 7867 74+_4 13 63 52
10/18 Open off 7872 136+_10 9 124 115 4runs 7872 71 69 70.png
10/18 Closed off 7871 51+_3 4 48 44
10 /18 Open On 7869 140+_10 10 123 115
10/18 Closed On 7870 53+_2 4 49 44
10/19 Open off 7873 124+_14 10 114 104 4runs 7873 74 76 75.png
10/19 Closed off 7874 59+_4 5 54 49
10 /19 Open On 7876 141+_8 10 117 108
10/19 Closed On 7875 60+_4 6 55 50
10/20 Open off 7879 129+_16 8 116 108 4runs 7879 80 82 81.png
10/20 Closed off 7880 49+_2 2 45 42
10 /20 Open On 7882 142+_3 8 108 99
10/20 Closed On 7881 53+_2 5 49 44


Test runs

Date Shutter source run number Notes
10/21 open off 7884 5 min separate pedestal from signal
10/20 Closed off 7885 5 min shows a difference.
10/22 open off 7891 5 min CATH 2930 V CATH2.93 GEM2.87.png
10/22 Closed off 7892 5 min CATH 2930 V


10/22 open off 7893 2 min CATH 3435 V CATH3.435 GEM2.87.png
10/22 Closed off 7894 2 min CATH 2435 V
10/23 open off 7898 5 min CATH 3435 V CATH3.435 GEM2.87 7897c 98.png low shutter close rate
10/23 Closed off 7897 5 min CATH 2435 V
10/23 open off 7902 min CATH 3435 V CATH3.435 GEM2.87 7901c 02.png
10/23 Closed off 7901 2 min CATH 2435 V





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