GEM and Sci. data and measuurements

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)
3.0	9 , 16, 26, 32, 46
2.5	62, 138, 208, 267, 329
2.0	259, 618 (2.5min), 767, 1001, 1241
1.9	1030, 2100, 3200, 4300, 5391
1.8	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	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		overnight
05/09/14	06:26:00	05/09/14	13:54:00	1187	99300		Daylight
05/09/14	13:54:00	05/09/14	21:18:00	1631	136290		Daylight
05/09/14	21:18:00	05/11/14	6:55	3648	301960		Daylight

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)	429031	311	23	Daylight
05/09/14	23:37:00	05/09/14	06:18:00(731)	99196			overnight
05/09/14	06:18:00	05/09/14	13:50:00(1183)	162485			Daylight
05/09/14	13:50:00	05/09/14	21:21:00(1633)	223301			Daylight
05/09/14	21:21:00	05/11/14	06:57:00(3650)	472100			Daylight

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	Count Rate (cout./s)	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