Difference between revisions of "GEM and Sci. data and measuurements"

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{| border="1" cellpadding="4"
 
{| border="1" cellpadding="4"
 
|-
 
|-
−
| Voltage (V) || Number of Counts (5min) || Average (
+
| Voltage (V) || Number of Counts (5min) || Average ( /min)
 
|-
 
|-
 
|  3.0    || 9 , 16, 26, 32, 46 || 8.5 +_ 0.5
 
|  3.0    || 9 , 16, 26, 32, 46 || 8.5 +_ 0.5
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| Voltage (V) || Number of Counts (5min) || Average (/min.)
 
| Voltage (V) || Number of Counts (5min) || Average (/min.)
 
|-
 
|-
−
| 1.00 || 87, 178, 254, 337, 430 || 82 +_ 7
+
| 1.00 || 87, 178, 254, 337, 430 || 86 +_ 2
 
|-
 
|-
−
| 0.7 || 219,410, 585, 768, 977 ||  
+
| 0.7 || 219,410, 585, 768, 977 || 203+_ 12
 
|-
 
|-
−
| 0.35  || 441, 941 (2.1min.), 1383, 1853, 2354
+
| 0.35  || 441, 941 (2.1min.), 1383, 1853, 2354 ||  453 +_ 11
 
|-
 
|-
−
|0.30 || 750(1.5min), 1012, 1551, 2050, 2573
+
|0.30 || 750(1.5min), 1012, 1551, 2050, 2573 ||  509+_ 8
 
|}
 
|}
  
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| Voltage (V) || Number of Counts (5min)
 
| Voltage (V) || Number of Counts (5min)
 
|-
 
|-
−
| 2.0    || 56, 110, 171, 234, 290
+
| 2.0    || 56, 110, 171, 234, 290 || 57+_2
 
|-
 
|-
−
|1.0 || 263, 484, 737, 978, 1233
+
|1.0 || 263, 484, 737, 978, 1233|| 248+_ 10
 
|-
 
|-
−
|0.6 || 497, 1055,1632, 2114, 2655  
+
|0.6 || 497, 1055,1632, 2114, 2655 || 524+_20
 
|-
 
|-
−
|0.25 || 945,1866,2787, 3676,4643
+
|0.25 || 945,1866,2787, 3676,4643|| 932+_11
  
 
|}
 
|}

Revision as of 15:49, 12 May 2014

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) 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 57+_2
1.0 263, 484, 737, 978, 1233 248+_ 10
0.6 497, 1055,1632, 2114, 2655 524+_20
0.25 945,1866,2787, 3676,4643 932+_11

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. 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
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