Difference between revisions of "GEM and Sci. data and measuurements"

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Revision as of 21:59, 8 May 2014

Counting Experiemnt

Discriminator setup for GEM and PMT's

The time period for counting 1 min.

GEM (amplified 15)


Voltage (V) Number of Counts (5min)
0.3 9 , 16, 26, 32, 46
0.25 62, 138, 208, 267, 329
0.20 259, 618 (2.5min), 767, 1001, 1241
0.19 1030, 2100, 3200, 4300, 5391
0.18


PMT (R)


0.3
0.25
0.20
0.15
0.10
0.05


PMT (L)


0.3
0.25
0.20
0.15
0.10
0.05

Counting without a source (Background)

GEM and Sci. in coincidence (and gate), GEM oprating voltage is 2.7, 3.1V GEM and cathode successively, both of the PMT's has 1kV input voltage.


Start Date Time End Date Time Duration (min.) Number of Counts (cout./s) Count Rate Notes
05/07/14 10:30 05/08/14 06:47 500 19392 0.65 Overnight
05/08/14 06:50 05/08/14 13:14 385 14540 0.63 Daylight
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