Cathode drift potential and count rate runs for 2.97kV GEM
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G4 Simulation
01/11/15
| Date | CATH. Voltage (kV) | V | Shutter | source | run number | Notes |
| 1/11 | 3.67 | 700 | Open | off | 8487 | 
|
| 1/11 | 3.67 | 700 | Closed | off | 8488 | |
| 1/11 | 3.77 | 800 | Open | off | 8491 | 
|
| 1/11 | 3.77 | 800 | Closed | off | 8490 | |
| 1/11 | 3.87 | 900 | Open | off | 8492 | 5' 34" 
|
| 1/11 | 3.87 | 900 | Closed | off | 8493 | |
| 1/11 | 3.97 | 1k | Open | off | 8495,96 |  
|
| 1/11 | 3.97 | 1k | Closed | off | 8494,97 | |
| 1/11 | 3.97 | 1k | Open | on | 8499 | 100px |
| 1/11 | 3.97 | 1k | Closed | on | 8498 | |
| 1/11 | 4.07 | 1.1k | Open | off | 8501 | filter amp decreased to from 2x to1x 100px |
| 1/11 | 4.07 | 1.1k | Closed | off | 8502 | |
| 1/11 | 4.07 | 1.1k | Open | on | 8504 | very low rate 100px |
| 1/11 | 4.07 | 1.1k | Closed | on | 8503 | very low rate |
| 1/11 | 4.07 | 1.1k | Open | on | 8506 | GEM decreased from 2.97 to 2.87 kV the rate increased 
|
| 1/11 | 4.07 | 1.1k | Closed | on | 8507 | GEM decreased from 2.97 to 2.87 kV |
| 1/11 | 4.07 | 1.1k | Open | off | 8509 | GEM decreased from 2.97 to 2.87 kV the rate increased 
|
| 1/11 | 4.07 | 1.1k | Closed | off | 8508 | GEM decreased from 2.97 to 2.87 kV |
| 1/11 | 4.07 | 1.1k | Open | off | 8510 | GEM decreased from 2.87 to 2.77 kV the rate increased 100px |
| 1/11 | 4.07 | 1.1k | Closed | off | 8511 | GEM decreased from 2.87 to 2.77 kV |
| 1/11 | 4.07 | 1.1k | Open | on | 8513 | GEM decreased from 2.87 to 2.77 kV the rate increased 100px |
| 1/11 | 4.07 | 1.1k | Closed | on | 8512 | GEM decreased from 2.87 to 2.77 kV |
| 1/12 | 3.87 | 1.1k | Open | off | 8515 | 6' GEM 2.77 kV 
|
| 1/12 | 3.87 | 1.1k | Closed | off | 8516 | |
| 1/12 | 3.87 | 1.1k | Open | on | 8518 | GEM 2.77 kV 
|
| 1/12 | 3.87 | 1.1k | Closed | on | 8517 | |
| 1/12 | 3.97 | 1.1k | Open | on | 8520 | GEM 2.87 kV 
|
| 1/12 | 3.97 | 1.1k | Closed | on | 8521 | |
| 1/12 | 3.97 | 1.1k | Open | off | 8523 | 6' GEM 2.87 kV 
|
| 1/12 | 3.97 | 1.1k | Closed | off | 8522 | 6' |
| 1/13 | 3.97 | 1.1k | Open | off | 8524 | GEM 2.87 kV 
|
| 1/13 | 3.97 | 1.1k | Closed | off | 8526 | |
| 1/13 | 3.97 | 1.1k | Open | on | 8528 | GEM 2.87 kV 
|
| 1/13 | 3.97 | 1.1k | Closed | on | 8527 | |
| 1/13 | 4.07 | 1.1k | Open | on | 8529 | GEM 2.97 kV 
|
| 1/13 | 4.07 | 1.1k | Closed | on | 8530 | |
| 1/13 | 4.07 | 1.1k | Open | off | 8532 | GEM 2.97 kV 
|
| 1/13 | 4.07 | 1.1k | Closed | off | 8531 | |
| 1/14 | 3.97 | 1.1k | Open | off | 8533 | GEM 2.87 kV 
|
| 1/14 | 3.97 | 1.1k | Closed | off | 8534 | |
| 1/14 | 3.97 | 1.1k | Open | on | 8536 | GEM 2.87 kV 
|
| 1/14 | 3.97 | 1.1k | Closed | on | 8535 | |
| 1/14 | 4.07 | 1.1k | Open | on | 8537 | low rate but a higher charge GEM 2.97 kV 
|
| 1/14 | 4.07 | 1.1k | Closed | on | 8538 | low rate but a higher charge |
| 1/14 | 4.07 | 1.1k | Open | off | 8540 | low rate but a higher charge GEM 2.97 kV 100px |
| 1/14 | 4.07 | 1.1k | Closed | off | 8539 | 7' low rate but a higher charge |
| 1/14 | 4.27 | 1.3k | Open | off | 8542 | GEM 2.97 kV 
|
| 1/14 | 4.27 | 1.3k | Closed | off | 8543 |
01/13/15
- Source on
- Source off
01/13/15
The figure below shows the difference between open and closed shutter as VGEM=2.97 and VCATH=4.07.
The two plots above show a difference as the source is on and when it is off in case of shutter open. But the rate decreases a lot when the GEM voltage increases even after increasing the drift voltage 200V to reach 1.3kV.
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