GEM and Sci. data and measuurements

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Counting Experiemnt using tennelec tc 534

All the counting was done by one scale tennelec tc 534.

Discriminator setup for GEM and PMT's

The counting period is 5 min for all the discriminator threshold measurements unless it is differently reported for a specific measurement.

GEM (amplified 15)


Voltage (V) Number of Counts (5min) Average ( /min)
3.0 9 , 16, 26, 32, 46 8.5 [math]\pm[/math] 0.5
2.5 62, 138, 208, 267, 329 66.7 [math]\pm[/math] 3
2.0 259, 618 (2.5min), 767, 1001, 1241 253 [math]\pm[/math] 5
1.9 1030, 2100, 3200, 4300, 5391 1002 [math]\pm[/math] 110
1.8 20667 20667


PMT (R)


Voltage (V) Number of Counts (5min) Average (/min.)
1.00 87, 178, 254, 337, 430 86 [math]\pm[/math] 2
0.7 219,410, 585, 768, 977 203[math]\pm[/math] 12
0.35 441, 941 (2.1min.), 1383, 1853, 2354 453 [math]\pm[/math] 11
0.30 750(1.5min), 1012, 1551, 2050, 2573 509[math]\pm[/math] 8


PMT (L) (amplified)


Voltage (V) Number of Counts (5min)
2.0 56, 110, 171, 234, 290 57[math]\pm[/math]2
1.0 263, 484, 737, 978, 1233 248[math]\pm[/math] 10
0.6 497, 1055,1632, 2114, 2655 524[math]\pm[/math]20
0.25 945,1866,2787, 3676,4643 932[math]\pm[/math]11

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 Count rate (cout./s) Notes
05/08/14 17:55 05/08/14 11:32:00 325 27120 1,4 Daylight
05/08/14 11:32:00 05/09/14 06:26:00 739 61825 1.4 overnight
05/09/14 06:26:00 05/09/14 13:54:00 1187 99300 1.4 Daylight
05/09/14 13:54:00 05/09/14 21:18:00 1631 136290 1.4 Daylight
05/09/14 21:18:00 05/11/14 6:55 3648 301960 1.4

Counting GEM (2.7, 3.1kV)

GEM operating voltage is 2.7, 3.1V GEM and cathode successively, and the disc. threshold is 2.0 V.

Without source


Start Date Time End Date Time Number of Counts Duration (min.) Count Rate (cout./s) Notes
05/08/14 16:14:19 05/08/14 23:37:00 (311 from 330 less by 19) 42903 311 2.3 Daylight
05/09/14 23:37:00 05/09/14 06:18:00(731) 99196 712 2.3 overnight
05/09/14 06:18:00 05/09/14 13:50:00(1183) 162485 1164 2.3 Daylight
05/09/14 13:50:00 05/09/14 21:21:00(1633) 223301 1614 2.3 Daylight
05/09/14 21:21:00 05/11/14 06:57:00(3650) 472100 3631 2.2 weekend

Counting without a source (Background)

GEM and Sci. are in coincidence, GEM detector operating voltage is 2.7, 3.1V for GEM and cathode successively, both of the PMT's have 1kV input voltage.

The disc. setup is as determined in the previous measurements, the count rate is 0.001 /min for scintillator-GEM coincidence


Counting Experiemnt using 3 scales including tennelec tc 534

GEM Counts

Without Source
Counting Time (min.) Number of Counts Count rate (cout./min.) Notes
15 882 59


With Source
Counting Time (min.) Number of Counts Count rate (cout./min) Notes
120 7390
120 16565 138 change to the same counter sued before for GEM ortec 875 same count number as run without the source 2.3 count/s