10/30/13 Mayir

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- Detector voltage is 2750, 2650V GEM and Cathode successively. GEM QDC channel is CH5, TDC inputs: GEM is CH27, and scint. CH29. GEM gate width is 1.78 us, and TDC hits are all within 2um as shown in the picture.

QDC input was amplified using ORTEC filter amplifier with the following settings: x1, fine is 4, integration 500 and diff. 50 ns.

TDC hits.png


Run Number Beam Run time pic Notes
6544 on 8' 10" R6544.png
6545 on 10' 12" R6545.png
6546 on 9' 8" R6546.png
6547 on 3'15" R6547.png V_CAT = V_GEM
6548 on 5' 32" 6548.png V_CAT = 2850V
6549 on 7' 56" R6549.png V_CAT = 2850V
6550 on 10'11" R6550.png V_CAT = 2850V
6551 on 3' 43" R6551.png V_CAT = 2800V
6552 on 3' 38" R6552.png V_CAT = 2800V

The data files measure the charge as the detector shutter is close.


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