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

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==Counting the coincidence for the PMT's==
 
==Counting the coincidence for the PMT's==
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The discriminator setup is 0.7 and 1.0 V for the Left and the right PMT successively.
  
 
;Without Source
 
;Without Source

Revision as of 23:58, 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 20667


PMT (R)


Voltage (V) Number of Counts (5min)
1.00 87, 178, 254, 337, 430
0.7 219,410, 585, 768, 977
0.35 441, 941 (2.1min.), 1383, 1853, 2354
0.30 750(1.5min), 1012, 1551, 2050, 2573


PMT (L) (amplified)


Voltage (V) Number of Counts (5min)
2.0 56, 110, 171, 234, 290
1.0 263, 484, 737, 978, 1233
0.6 497, 1055,1632, 2114, 2655
0.25 945,1866,2787, 3676,4643

Counting the coincidence for the PMT's

The discriminator setup is 0.7 and 1.0 V for the Left and the right PMT successively.

Without Source
Start Date Time End Date Time Duration (min.) Number of Counts (cout./s) Count Rate Notes
05/08/14 17:55


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