GEM performance data graphs

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IAC runs

ADC is connected,

Beam On: run 5496 as the detector is on 13:31:11 13:47:18 run 5497 as the detector is off 13:52:51


Run Number Beam Start Time End time Notes
5496 on 13:31:11 13:47:18 Detector is in operating voltage.
5497 on 13:52: 51 Detector is in off mode
5515 off 5:59: 46 6:27:43 Detector is in operating voltage.
5516 off 6:29:32 06:38:13 Detector is in off mode
5517 off 6:43:42 06:50:05 shutter is close
5518 off 06:55:59 07:06:57 Detector is in operating voltage.
5519 on 07:56:53 Detector is in operating voltage.
5520,21,22 on 09:38:36 Detector is in operating voltage.
5523 on 9:51:00 10:13:38 Detector is in operating voltage.
5524 on 10:14:35 PMT is added to ADC ch#14
5526 on 11:51:35 12:02:49 PMT TDC ch#0 GEM ch#2 ADC ch# 12 GEM Ch#14 PMT
5528 on 12:21:28 13:35:26
5529 on 13:36:28 14:44:37
5530 on 14:45:24 15:09:16
5531 on 15:09:41 15:20:03
5532 on 15:23:31 15:31:00
5532 on 15:23:31 16:04:31
5532 on 16:05:00 16:04:31
5537 on 16:22:00 16:27:03
5541 on 16:42:02 16:27:03

All the previous runs has a positive input to the ADC.

Tuesday 07/30/13
Run Number Beam Start Time End time Notes
5593 on 15:55:04 16:29:20 stable beam to the end of the run.
5594 on 16:36:19 17:03:52 stable beam to the end of the run.
5595 on 08:28:09 08:45:19 stable beam to the end of the run.
5596 on 08:47:16 10:06:37 stable beam to the end of the run.
5603 on but trasfered 13:31:30 14:38:02 shutter is close
Wednesday 08/21-22/13

- Detector voltage is 2300, 2800V GEM and Cathode successively. GEM has not any output to the TDC for 5773, 5774.



Run Number Beam Start Time End time Notes
5773 on beam on for 4-10s, overflow
5774 on beam on for 4-10s shutter is close, beam energy is 7.5 MeV
5775 on beam on for 4-10s shutter is open, beam energy is 7.5 MeV
5776 on beam on for 4-10s shutter is open, beam energy is 7.5 MeV
5777 on beam on for 4-10s shutter is close, beam energy is 7.5 MeV
5778 off 19:54:17 6:00:00 shutter is close 2.8, 3.4 G/C, Amp.6_6
5779 off 6:05:33 shutter is open 2.8, 3.4 G/C, Amp.6_6

09/01/13

Detector voltage is 2.8, 3.4 kV for cathode and GEM.


Run Number Notes
5869 shutter open x
5872 shutter close x
5873 shutter open x
5876 shutter open x
5877 shutter close x
5884 shutter close 1 R5884 shutterclose.png
5885 shutter open 1 R5885 shutteropen.png


09/05/13

Run Number Amp level discriminator level Notes
5925 50, 4 3.6 shutter close
5926 50, 4 3.6 shutter open
5927 100 3.6 shutter open
5928 200 3.6 shutter open, high amp level
5929 100, 10 3.6 shutter open high amp level
5930 100, 7 3.6 shutter open
5936 100, 7 0.1 shutter open, noise peak channel 74
5937 100, 7 0.1 shutter open, V_cath = V_GEM,noise peak channel 74
5948 100, 7 1.15 shutter open, detector is on, no signal overlapping, reached to te signal highest rate, with almost 100% signal to noise ratio.

The following run has the same setting as the last run, unless there is achange written in the notes.

Cath_3400 GEM_2800V

Run Number start time end time shutter Notes
5948 14:22:14 14:36:09 open
5949 15:02:43 15:19:59 open
5950 15:20:42 15:35:07 open r5951 and r5952 has the shutter close and integrate 1
5953 16:37:03 15:35:07 close integrate lower from 1 to 0.5,sthg strange happened, root does not show a picture and the rate increased suddenly to 450 Hz
5957 09:01:07 09:25:12 open integrate 0.5
5959 09:30:21 09:55:15 close integrate 1

Cath_3350 GEM_2750V

Run Number start time end time shutter Notes
5960 09:58:42 10:30:28 close
5961 10:30:49 11:11:50 close
5962 11:13:03 11:28:21 close
5963 11:32:44 11:58:39 open
5964 11:59:17 12:21:59 open
5965 12:22:24 12:42:38 open






Cath_3300 GEM_2700V

Run Number start time end time shutter Notes
5967 19:22:05 19:48:42 open
5968 19:49:04 20:15:44 open
5969 20:15:44 20:47:18 open
5978 11:33:33 11:48:05 close
5979 11:48:27 11:59:49 close
5980 12:00:17 12:31:03 close


Cath_3250 GEM_2650V

Run Number start time end time shutter Notes
5972 20:52:15 21:15:18 open
5973 06:43:29 07:29:57 open
5974 07:30:49 08:17:48 open
5975 08:23:58 09:30:48 close
5976 09:33:58 10:42:48 close
5977 10:43:11 11:31:26 close


Cath_3200 GEM_2600V

Run Number start time end time shutter Notes
5983 17:42:06 22:07:02 close
5984 17:42:06 06:43:46 N close very low noise level
5985 06:44:44 22:07:02 close


Cath_3150 GEM_2550V

Run Number start time end time shutter Notes
5954 16:55:52 08:44:23 N close integrate 1 rate changed from 1.2 Hz to 57 Hz due to increase the noise level overnight only.
5966 12:44:21 19:15:35 open