Difference between revisions of "GEM Fission IAC 11082013"
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=Runlist= | =Runlist= | ||
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| 6603|| added attenuator, changed CFD post amp no longer differentiating signal, Shutter '''Closed''' V_gem= 2800 V_cath=3100, 10 Hz clock in scaler channel 5, rate was 114 Hz, | | 6603|| added attenuator, changed CFD post amp no longer differentiating signal, Shutter '''Closed''' V_gem= 2800 V_cath=3100, 10 Hz clock in scaler channel 5, rate was 114 Hz, | ||
|- | |- | ||
| + | | 6605|| added attenuator of 5 dB, switch the CFD to LED with a threshold of 150 mV,post amp no longer differentiating signal, Shutter '''Closed''' V_gem= 2850 V_cath=3200, 10 Hz clock in scaler channel 5, rate was 26 Hz, | ||
| + | |- | ||
| + | | 6606|| added attenuator of 5 dB, switch the CFD to LED with a threshold of 150 mV,post amp no longer differentiating signal, Shutter '''Open''' V_gem= 2850 V_cath=3200, 10 Hz clock in scaler channel 5, rate was 26 Hz, | ||
| + | |- | ||
| + | | 6608|| added attenuator of 5 dB, LED with a threshold of 120 mV,post amp no longer differentiating signal, Shutter '''Open''' V_gem= 2850 V_cath=3200, 10 Hz clock in scaler channel 5, rate was 55 Hz, | ||
| + | |- | ||
| + | | 6609|| added attenuator of 5 dB, LED with a threshold of 120 mV,post amp no longer differentiating signal, Shutter '''Closed''' V_gem= 2850 V_cath=3200, 10 Hz clock in scaler channel 5, rate was 38 Hz, | ||
| + | |- | ||
| + | |||
| + | | 6663|| attenuator of 3 dB, LED with a threshold of 217 mV,post amp integrating 500, Shutter '''Open''' V_gem= 2820 V_cath=3225, 10 Hz clock in scaler channel 5, rate was 27 Hz, | ||
| + | |- | ||
| + | | 6664|| attenuator of 3 dB, LED with a threshold of 217 mV,post amp x1 integrating 500, Shutter '''Closed''' V_gem= 2820 V_cath=3225, 10 Hz clock in scaler channel 5, rate was 26 Hz, GFC for closed is 1219+_ 3, and for open 1820 +_2 [[File:r6664_scopepic.png| 200 px]] [[File:r6664-6663_cmpare.png| 200 px]] | ||
| + | |- | ||
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|} | |} | ||
[[TGEMS#GEM_fission_chamber_tests]] | [[TGEMS#GEM_fission_chamber_tests]] | ||
Latest revision as of 15:15, 11 November 2013
Runlist
| Run | Conditions |
| 6588 | Run GEM detector in Hall at V_gem= 2650 V_cath=2950 Shutter Open! Signal on ADC5 at about 1000 channels, CFD threshold at 84 mV, 10 Hz clock in scaler channel 5, rate was 7 Hz |
| 6589 | same as run 6588 except, V_gem = V_cath = 2650 and lowered CFD threshold to 64 mV because there were no triggers, rate was 2 kHz, noise was at 1000 channels as well, a lot of pileup but histogram seems representative of noise. increase GEM gain |
| 6593 | Run GEM detector in Hall at V_gem= 2700 V_cath=3150, CFD threshold at 88 mV, 10 Hz clock in scaler channel 5, rate was 27 Hz,  
|
| 6594 | V_gem= 2750 V_cath=3150, CFD threshold at 88 mV, 10 Hz clock in scaler channel 5, rate was 27 Hz, |
| 6595 | Shutter Closed now V_gem= 2750 V_cath=3150, CFD threshold at 88 mV, 10 Hz clock in scaler channel 5, rate was 27 Hz, 33 min 29 sec, |
| 6596 | Shutter Open now V_gem= 2800 V_cath=3100, CFD threshold at 88 mV, 10 Hz clock in scaler channel 5, rate was 31 Hz, |
| 6597 | Shutter Closed now V_gem= 2800 V_cath=3100, CFD threshold at 88 mV, 10 Hz clock in scaler channel 5, rate was 27 Hz, |
| 6598 | Decreased Post amp from x6 to x1 Shutter Closed V_gem= 2800 V_cath=3100, CFD threshold at 21 mV, 10 Hz clock in scaler channel 5, rate was 22 Hz, |
| 6599 | same as run 6598 V_gem= 2800 V_cath=2800, CFD threshold at 21 mV, rate was 79 Hz, |
| 6600 | Decreased Post amp from x6 to x1 Shutter Closed V_gem= 2800 V_cath=3100, CFD threshold at 15 mV, 10 Hz clock in scaler channel 5, rate was 79 Hz, |
| 6601 | Decreased Post amp from x6 to x1 Shutter Open V_gem= 2800 V_cath=3100, CFD threshold at 15 mV, 10 Hz clock in scaler channel 5, rate was 114 Hz, |
| 6603 | added attenuator, changed CFD post amp no longer differentiating signal, Shutter Closed V_gem= 2800 V_cath=3100, 10 Hz clock in scaler channel 5, rate was 114 Hz, |
| 6605 | added attenuator of 5 dB, switch the CFD to LED with a threshold of 150 mV,post amp no longer differentiating signal, Shutter Closed V_gem= 2850 V_cath=3200, 10 Hz clock in scaler channel 5, rate was 26 Hz, |
| 6606 | added attenuator of 5 dB, switch the CFD to LED with a threshold of 150 mV,post amp no longer differentiating signal, Shutter Open V_gem= 2850 V_cath=3200, 10 Hz clock in scaler channel 5, rate was 26 Hz, |
| 6608 | added attenuator of 5 dB, LED with a threshold of 120 mV,post amp no longer differentiating signal, Shutter Open V_gem= 2850 V_cath=3200, 10 Hz clock in scaler channel 5, rate was 55 Hz, |
| 6609 | added attenuator of 5 dB, LED with a threshold of 120 mV,post amp no longer differentiating signal, Shutter Closed V_gem= 2850 V_cath=3200, 10 Hz clock in scaler channel 5, rate was 38 Hz, |
| 6663 | attenuator of 3 dB, LED with a threshold of 217 mV,post amp integrating 500, Shutter Open V_gem= 2820 V_cath=3225, 10 Hz clock in scaler channel 5, rate was 27 Hz, |
| 6664 | attenuator of 3 dB, LED with a threshold of 217 mV,post amp x1 integrating 500, Shutter Closed V_gem= 2820 V_cath=3225, 10 Hz clock in scaler channel 5, rate was 26 Hz, GFC for closed is 1219+_ 3, and for open 1820 +_2  
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