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 | 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 |
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.
| 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 |