GEM and Sci. data and measuurements
Revision as of 19:56, 12 May 2014 by Abdehait (talk | contribs) (→Counting without a source (Background))
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 0.5 |
| 2.5 | 62, 138, 208, 267, 329 | 66.7 3 |
| 2.0 | 259, 618 (2.5min), 767, 1001, 1241 | 253 5 |
| 1.9 | 1030, 2100, 3200, 4300, 5391 | 1002 110 |
| 1.8 | 20667 | 20667 |
- PMT (R)
| Voltage (V) | Number of Counts (5min) | Average (/min.) |
| 1.00 | 87, 178, 254, 337, 430 | 86 2 |
| 0.7 | 219,410, 585, 768, 977 | 203 12 |
| 0.35 | 441, 941 (2.1min.), 1383, 1853, 2354 | 453 11 |
| 0.30 | 750(1.5min), 1012, 1551, 2050, 2573 | 509 8 |
- PMT (L) (amplified)
| Voltage (V) | Number of Counts (5min) | |
| 2.0 | 56, 110, 171, 234, 290 | 572 |
| 1.0 | 263, 484, 737, 978, 1233 | 248 10 |
| 0.6 | 497, 1055,1632, 2114, 2655 | 52420 |
| 0.25 | 945,1866,2787, 3676,4643 | 93211 |
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. are in coincidence, GEM detector operating voltage is 2.7, 3.1V for GEM and cathode successively, both of the PMT's have 1kV input voltage.
The disc. setup is as determined in the previous measurements, the count rate is 0.001 /min for scintillator-GEM coincindence