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 |
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 (330) | 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
|
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 |