GEM and Sci. data and measuurements

Counting Experiemnt

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

disc. 2.5 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. 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.

The disc. setup is as determined in the previous measurements. The count rate is 0.001 /min