20min run peak sensing histograms
Revision as of 20:08, 26 October 2014 by Abdehait (talk | contribs) (→Peak sensing Measured Spectra)
Cathode Voltage Effect on the Peak sensing Spectrum
All the measurements have the same GEM voltage 2.87 kV, just cathode voltage changes.
the figure below shows the the spectrum when the cathode at 3.735 kV (865V higher than the top GEM's voltage), which reaches to the maxmum rate that DAQ can measure.
We have seen the distribution on the far right before. Can't seem to find those old histograms though. What happened to the work done in 2013
A: Do you mean the QDC measurements ? GEM performance QDC data graphs
Peak sensing Measured Spectra
Date | CATH. Voltage (kV) | V | Shutter | source | run number | Notes |
10/23 | 2.870 | 0 | Open | off | 7916 | 3h 45min![]() |
10/23 | 2.870 | 0 | Closed | off | 7917 | 12h 12min |
10/23 | 2.995 | 125 | Open | off | 7912 | ![]() |
10/23 | 2.995 | 125 | Closed | off | 7913 | |
10/25 | 3.050 | Open | off | 7920 | 5min![]() | |
10/25 | 3.050 | Closed | off | 7926 | 5min | |
10/25 | 3.030 | Open | off | 7921 | 6min ![]() | |
10/25 | 3.030 | Closed | off | 7925 | 5min | |
10/25 | 3.000 | Open | off | 7923 | ![]() | |
10/25 | 3.000 | Closed | off | 7924 | ||
10/23 | 3.120 | 250 | Open | off | 7899 | ![]() |
10/23 | 3.120 | 250 | Closed | off | 7900 | |
10/23 | 3.245 (redo) | 375 | Open | off | 7904 | ![]() |
10/23 | 3.245 | 375 | Closed | off | 7905 | |
10/23 | 3.245 | 375 | Open | off | 7928 | 21min ![]() |
10/23 | 3.245 | 375 | Closed | off | 7927 | |
10/23 | 3.370 | 500 | Open | off | 7908 (22') | ![]() |
10/23 | 3.370 | 500 | Closed | off | 7909 | |
10/26 | 3.735 | 865 | Open | off | 7933 | 2k Hz 3 min. rate ![]() |
10/26 | 3.735 | 865 | Closed | off | 7932 | 0.5-1k Hz 3 min. |
10/26 | 3.585 | Open | off | 7934 | 1k Hz 123" rate ![]() | |
10/26 | 3.585 | Closed | off | 7935 | 0.5k Hz 118".
| |
10/26 | 3.735 | Open | off | 7938 | 0.41k rate 100px | |
10/26 | 3.735 | Closed | off | 7939 | 0.15 .
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GEM-2.87 kV CATH-3.435 kV
Test runs
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