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)
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 GEM

disc. 2.5 V

Without source

Start Date	Time	End Date	Time	Duration (min.)	Number of Counts (cout./s)	Count Rate	Notes
05/08/14	16:14:19

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