GEM performance data graphs

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histogram analysis Shutter Open - Closed

GEM detector voltage settings:

Discriminator:

Amplification:

Shutter open run 4676 took data for 44480 seconds (12.4 hrs) and Shutter closed run 4675 took data for 28638 seconds (8 hrs)

R4676 raw.png R4675 raw.png
Run 4676 :raw shutter Open ADC spectrum Run 4675 raw shutter closed ADC spectrum
R4676 norm.png R4675 norm.png
Run 4676 :NORMALIZED shutter Open ADC spectrum Run 4675 NORMALIZED shutter closed ADC spectrum


Assume that the single peak for the Closed shutter spectrum is the result of less charge being liberated by the right most peak of the shutter open spectrum due to the energy lost by the ionizing particle as it travels through the 1mm thick FR4 shutter into the ionization chamber.

R4676-4675 Ovrlay.png R4675-4675 ShiftedOverlay raw.png
Run 4676 :raw shutter Open ADC spectrum Run 4675 raw shutter closed ADC spectrum
R4676-4675.png
Shutter Open - Shutter Closed Difference


Run List1 GEM, Cathode 2.6, 2.9kV

/home/daq/CODA/CODAreader/ROOT_V5.30/V775mV792/evio2nt -fr4685.dat > /dev/null

The voltage of the Cathode is 2.9 kV and of the GEMs is 2.6 kV.

The amplifier is on x6 level fine gain which will amplify the detector signal to 33.5 times (6.56+_ 0+_ V/196 +_ 0.6mV).


Run # discrimination level ortec 474 amplification Start Date End Date Shutter Position Source pulse snapshot picture and Comparison notes
4662 0.25 4 17:00 04/04 10:00 04/05 open off R4664 0.25disc ortex4.png
4663 1.1 4 10:00 04/05 13:14 04/05 open off R4664 1.1disc ortex4.png
4664 0.9 4 13:14 04/05 16:48 04/05 open off R4664 0.9disc ortex4.png
4665 0.9 4 17:11 04/05 20:21 04/05 open on R4664 0.9disc ortex4 sourceOn.png
4666 1.1 4 20:26 04/05 21:38 04/05 open On R4664 1.1disc ortex4 sourceOn.png
4668 0.25 6 21:47 04/05 7:45 04/06 open off compare ampx4 (blue) and ampx6 (red)Comp r4662r4662 0.25disc ortex4x6.png R4664 0.25disc ortex6.png ortec #of counts 1.37M, ADC # of counts 676056
4670 0.25 4 11:00 04/05 11:55 closed On
4671 0.25 6+ fine level 3 12:28:38 04/06 12:38 closed off
4672 0.25 10 12:38:28 04/06 12:42 closed off
4673 0.25 6+fine level 5 12:42:59 04/06 12:47:30 closed off
4674 0.25 6+fine level 4.5 12:48:18 04/06 13:01:50 closed Off
4675 0.25 6+fine level 4.5 13:03:35 04/06 21:00:55 closed Off R4675 0.25disc ortex6.png
4676 0.25 6+fine level 4.5 21:06:07 04/06 09:27:29 04/07 open Off

R4676 0.25disc ortex6 shutteropen.pngR4676 0.25disc ortex6 compshutteropen close.png compare shutter open (blue) and shutter close (red)

4677 0.25 6+fine level 4.5 09:31:03 04/07 21:31:07 04/07 open on

R4676 0.25disc ortex6 shutteropen sourceOn.pngR4677 0.25disc ortex6 compshutteropen sourceon on off.png compare shutter open as the source is off(blue) and as it is on (red)

4678 0.25 6+fine level 4.5 21:32:10 04/07 close on R4678 0.25disc ortex6 shutterclose sourceon.png
4679 0.25 6+fine level 4.5 10:39:19 04/08 22:22:21 04/08 close off R4678 0.25disc ortex6 shutterclose sourceff.png
4680 0.25 6+fine level 4.5 22:26:10 04/08 10:05:07 04/09 open off R4680 0.25disc ortex6 shutteropen sourceff.png
4681 0.25 6+fine level 4.5 10:08:59 04/09 14:26:12 04/09 open on R4681 0.25disc ortex6 shutteropen sourceon.png
4682 0.25 6+fine level 4.5 14:30:43 04/09 06:51:39 04/10 open off R4682 0.25disc ortex6 shutteropen sourceoff.png
4683 0.25 6+fine level 4.5 06:56:00 04/10 16:07:36 04/10 close off R4683 0.25disc ortex6 shutterclose sourceoff.png

compare r4683 (red) and r4679 (blue) as both have hsutter is close without source Comp r4683 r4679S 0.25disc ortex6 shutterclose sourceoff.png

4684 0.25 6+fine level 4.5 16:10:59 04/10 10:46:10 04/11 close off R4684 0.25disc ortex6 shutterclose sourceoff.png

compare r4684 (red) and r4683 (blue) as both have hsutter is close without source Comp r4684 r4683S 0.25disc ortex6 shutterclose sourceoff.png

4685 0.25 6+fine level 4.5 10:50:52 04/11 07:06:55 04/12 open off R4685 0.25disc ortex6 shutteropen sourceoff.png Comp 4676g 4682r 4685b.png r4685 (blue) has the two peaks close in height compared to the other two runs (r4682(red) and r4676(green), which indicates that the source has a new source of charge as result of a decay to one of the short half life alpha emitting daughters.
4686 0.25 6+fine level 4.5 07:37:34 04/12 19:50:55 04/12 close off R4686 0.25disc ortex6 shutteropen sourceoff.png Comp r4686b r4684r r4679g.png comparing three runs together r4686(blue),r4684(red), and r4679 (green). they are all record the charge as the shutter is close. it is noticed that the last run reproduced the expected peak that was observed before in r4679
4687 0.25 6+fine level 4.5 19:54:17 04/12 06:59:28 04/13 open off R4687 0.25disc ortex6 shutteropen sourceoff.png
4688 0.25 6+fine level 4.5 07:01:35 04/13 10:31:31 04/13 open off R4688 0.25disc ortex6 shutteropen sourceoff.png
4689 0.25 6+fine level 4.5 10:33:13 04/13 19:09:56 04/13 close off R4689 0.25disc ortex6 shutterclose sourceoff.png Comp 4686r 4689b 4685b.png the new peak (in 4688) was partial blocked by the shutter but the tail is still high compared to 4686.
4690 0.25 6+fine level 4.5 19:26:44 04/13 06:41:16 04/14 open off R4690 0.25disc ortex6 shutteropen sourceoff.png
4691 0.25 6+fine level 4.5 21:15:44 04/13 09:58:16 04/14 open off R4691 0.25disc ortex6 shutteropen sourceoff.png
4692 0.25 6+fine level 4.5 10:05:14 04/15 16:34:50 04/15 open off R4692 0.25disc ortex6 shutteropen sourceoff.png back to the normal spectrum as the shutter is open
4693 0.25 6+fine level 4.5 16:41:05 04/15 07:29:25 04/15 close off R4693 0.25disc ortex6 shutterclose sourceoff.png
4694 0.25 6+fine level 4.5 07:39:30 04/16 14:51:29 04/16 close off R4694 0.25disc ortex6 shutterclose sourceoff.png
4694 battery R4694 battery.png battery charged collected by the ADC without any electronics used1
4695 battery R4695 battery MINmodules.png battery charged collected by the ADC as the battery charge passes through the NIM-modules
4914 0.57 6+fine level 4.5 13:39:25 04/30 07:26:42 05/01 open off R4914 0.57disc ortex6 shutteropen sourceoff.png
4917 0.36 6+fine level 4.5 10:00:21 05/01 14:43:05 05/01 open off R4917 0.36disc ortex6 shutteropen sourceoff.png
4918 0.36 6+fine level 4.5 14:53:41 05/01 13:56:05 05/01 open on R4918 0.36disc ortex6 shutteropen sourceon.png
4935 0.36 6+fine level 6 16:38:38 05/01 07:30:04 05/02 open off R4935 0.36disc ortex6 shutteropen sourceoff.png
4936 0.36 6+fine level 6 07:34:01 05/02 15:02:30 05/02 close off R4936 0.36disc ortex6 shutterclose sourceoff.png
4989 0.36 6+fine level 6 11:47:06 05/03 15:40:47 05/03 close off R4989 0.36disc ortex6 shutterclose sourceoff.png 10Hz
4990 0.36 6+fine level 6 15:44:10 05/03 22:36:28 05/03 open off R4990 0.36disc ortex6 shutteropen sourceoff.png 10Hz
4992 0.36 6+fine level 6 22:57:47 05/03 08:51:26 05/04 close off R4992 0.36disc ortex6 shutterclose sourceoff.png 100Hz clock
5078 0.5 6+fine level 6 20:39:35 05/08 06:09:23 05/09 open off R5078 0.5disc ortex6 shutteropen sourceoff.png 10Hz
5079 0.36 6+fine level 6 06:47:58 05/09 14:26:08 05/09 open off R5079 0.36disc ortex6 shutteropen sourceoff.png 10Hz
5091 0.36 6+fine level 6 16:25:48 05/09 21:21:11 05/09 close off R5091 0.36disc ortex6 shutterclose sourceoff.png without clock
5092 0.36 6+fine level 6 21:26:23 05/09 06:23:34 05/10 open off R5092 0.36disc ortex6 shutteropen sourceoff.png 10 clock
overlayed plots need to be normalized to the running time! sure Comp newpeak develp.png comparing 4691 (light brown),4690(blue),4687 (red),4676 (green),4685 (purple)


Run List2 GEM,Cathode 2.65,2.95kV

The voltage of the Cathode is 2.95 kV and of the GEMs is 2.65 kV.


Run # discrimination level ortec 474 amplification Attenuation (dB) Start Date End Date Shutter Position Source pulse snapshot picture and Comparison notes
5061 0.40 6 level 6 6 12:15:47 05/04 18:16:57 05/04 close off 10Hz R5061 0.4disc ortex6 6 shutterclose sourceoff.png
5062 0.40 6 level 6 6 18:23:41 05/04 16:12:20 05/05 open off 10Hz R5062 0.4disc ortex6 6 shutteropen sourceoff.png
5063 0.40 6 level 6 8 16:18:02 05/05 22:55:20 05/05 open off 10Hz R5063 0.4disc ortex6 8 shutteropen sourceoff.png
5064 0.40 6 level 6 8 22:59:02 05/05 07:32:26 05/06 open on 10Hz R5064 0.4disc ortex6 8 shutteropen sourceon.png
5065 0.40 6 level 6 8 07:37:17 05/06 12:39:17 05/06 close on 10Hz R5065 0.4disc ortex6 6 shutterclose sourceon.png
5066 0.40 6 level 6 8 02:43:55 05/06 17:44:20 05/06 close off 10Hz R5066 0.4disc ortex6 6 shutterclose sourceoff.png
5198 0.96 6 level 6 8 18:12:00 06/03 00:05:32 06/04 open off 700Hz R5198 0.96disc ortex6 6 shutteropen sourceoff.png
5200 0.96 6 level 6 8 00:08:49 06/04 07:19:28 06/04 close off 10Hz R5200 0.96disc ortex6 6 shutterclose sourceoff.png
5204 0.96 6 level 6 8 09:33:45 06/04 14:31:49 06/04 open off 10Hz R5204 0.96disc ortex6 6 shutteropen sourceoff.png
5215 1.55 6 level 6 8 16:04:59 06/04 20:15:59 06/04 close off 10Hz

R5215 1.55disc ortex6 6 shutterclose sourceoff.png

5224 1.25 6 level 6 8 21:45:45 06/04 07:12:49 06/05 open off 10Hz R5224 1.25disc ortex6 6 shutteropen sourceoff.png
5225 0.96 6 level 6 8 7:15:51 06/05 07:12:49 06/04 open off 10Hz R5224 0.96disc ortex6 6 shutteropen sourceoff.png



Run List3 GEM,Cathode 2.7,3kV

Calibration curve

Charge channelnumber x6 6 attenuated.png


,Measurements


The voltage of the Cathode is 3 kV and of the GEMs is 2.7 kV. Without any attenuation -85 mV was the initial voltage and its equivalent charge is 1.02 nC. According this value the charge below is calculated using

[math] Q = Q_0 10^{(L_v/20)} [/math]

Run # discrimination level ortec 474 amplification Attenuation (dB) Start Date End Date Shutter Position Source pulse snapshot picture and Comparison notes Channel number ADC charge (nC) Detector charge (nC)
5072 0.50 6 level 6 11 18:20:09 05/06 22:28:25 05/04 open off 10Hz R5072 0.5disc ortex6 6 shutteropen sourceoff.png 1650 , 3500 0.766, 1.506 7.7, 15.06
5073 0.50 6 level 6 11 22:31:50 05/06 06:09:58 05/07 open on 10Hz R5073 0.5disc ortex6 6 shutteropen sourceon.png
5074 0.50 6 level 6 11 06:16:00 05/07 12:39:58 05/07 close on 10Hz R5074 0.5disc ortex6 6 shutterclose sourceon.png
5075 0.50 6 level 6 11 12:45:04 05/07 07:58:00 05/08 close off 10Hz R5075 0.5disc ortex6 6 shutterclose sourceoffS.png
5076 0.50 6 level 6 11 08:00:44 05/08 13:06:40 05/08 open off 10Hz R5076 0.5disc ortex6 6 shutteropen sourceoff.png
5077 0.50 6 level 6 11 13:09:56 05/08 20:27:39 05/08 close off 10Hz R5077 0.5disc ortex6 6 shutterclose sourceoff.png





Run List 4 GEM,Cathode 2.75,3.05kV

Run # discrimination level ortec 474 amplification Attenuation (dB) Start Date End Date Shutter Position Source pulse snapshot picture and Comparison notes Channel number ADC charge (nC) Detector charge (nC)
5228 1.29 6 level 6 15 10:26:45 06/05 14:48:25 06/05 open off 10Hz R5228 15att ortex6 6 shutteropen sourceoff.png
5229 1.29 6 level 6 15 14:49:16 06/05 19:11:06 06/05 close off 10Hz R5029 15att ortex6 6 shutterclose sourceoff.png
5230 1.29 6 level 6 15 19:12:39 06/05 04:08:00 06/06 open off 10Hz R5230 15att ortex6 6 shutteropen sourceoff.png
5235 1.29 6 level 6 15 04:10:19 06/06 07:35:30 06/06 close off 10Hz R5035 15att ortex6 6 shutterclose sourceoff.png
5236 1.29 6 level 6 15 07:36:39 06/06 10:04:15 06/06 open off 10Hz R5236 15att ortex6 6 shutteropen sourceoff.png
5237 1.29 6 level 6 15 10:06:54 06/06 14:51:54 06/06 close off 10Hz R5237 15att ortex6 6 shutterclose sourceoff.png


Run List 5 GEM,Cathode 2.8,3.10kV

Run # discrimination level ortec 474 amplification Attenuation (dB) Start Date End Date Shutter Position Source pulse snapshot picture and Comparison notes Channel number ADC charge (nC) Detector charge (nC)
5261 1.63 6 level 6 17 17:10:06 06/06 21:41:15 06/06 close off 10Hz R5261 17att ortex6 6 shutterclose sourceoff.png
5262 1.63 6 level 6 17 21:43:02 06/06 05:53:12 06/07 open off 10Hz R5262 17att ortex6 6 shutteropen sourceoff.png
5263 1.63 6 level 6 17 17:10:06 06/06 09:51:53 06/07 close off 10Hz R5263 17att ortex6 6 shutterclose sourceoff.png
5264 1.63 6 level 6 17 09:52:59 06/07 14:22:56 06/07 open off 10Hz R5264 17att ortex6 6 shutteropen sourceoff.png
5265 1.63 6 level 6 17 14:24:31 06/07 17:52:16 06/07 close off 10Hz R5265 17att ortex6 6 shutterclose sourceoff.png
5266 1.63 6 level 6 17 18:02:41 06/07 22:23:11 06/07 open off 10Hz R5266 17att ortex6 6 shutteropen sourceoff.png





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