Cathode drift potential and count rate runs for 2.97kV GEM

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01/11/15

Date CATH. Voltage (kV) [math]\displaystyle{ \Delta }[/math] 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 File:CATH3.97 GEM2.97 8498c 8499.png
1/11 3.97 1k Closed on 8498
1/11 4.07 1.1k Open off 8501 filter amp decreased to from 4x to2x File:CATH4.07 GEM2.97 8502c 8501.png
1/11 4.07 1.1k Closed off 8502
1/11 4.07 1.1k Open on 8504 very low rate File:CATH4.07 GEM2.97 8503c 8504.png
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 File:CATH4.07 GEM2.97 8511c 8510.png
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 File:CATH4.07 GEM2.97 8512c 8513.png
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 File:CATH4.07 GEM2.97 8539c 8540.png
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.




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