GEM performance data graphs

IAC runs as the electron beam in use

IAC runs as the electron beam in use

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

09/23/13 BeamOn shutter close2.8_3.4kV

ADC : GEM CH#5, Scintillator 11

TDC: GEM CH#27,31 , Scintillator 29

PS-ADC: GEM CH#15

Run Number	Beam	Start Time	End time	Notes
6087	on	11:58:23	12:56:30	, ADC does not collect charge from the scintillator 3.4,2.8kV
6088	on	12:56:58		beam on, 3.4,2.8kV
6089	on	13:41:15	14:19:01	, 2.8,2.8kV, run included a beam off then beam on again.
6090	on	14:31:39	14:34:45	3.4,2.8kV
6091	on	14:36:29	15:20:07	43' 38" 3.4,2.8kV
6092	on	15:22:16	15:41:36	19' 20" 3.4,2.8kV
6093	on	15:42:46	16:27:24	44 38" 3.4,2.8kV
6094	on	16:28:28	16:58:48	30' 20" 3.4,2.8kV, high sci. voltage that saturate the ADC, b

09/24/13 BeamOn shutter open 2.8_3.4kV

ADC : GEM CH#5, Scintillator 11

TDC: GEM CH#27,31 (just 31 gives time hits but it is a kind of weird!!!!!), Scintillator 29

PS-ADC: GEM CH#15

Run Number	Beam	Start Time	End time	Notes
6095	on	09:49:48	10:35:32	beam turned off twice for a short time
6096	on	10:36:06	13:41:58	scin. ADC signal without Amplification
6097	on	13:42:41	16:49:59
6098	on	16:50:11	17:08:43

09/25/13 BeamOn shutter open 3.3,2.7kV

ADC : GEM CH#5, Scintillator 9,11

TDC: GEM CH#27,31,28 , Scintillator 29

PS-ADC: GEM CH#15

Run Number	Beam	Start Time	End time	Notes
6100	on	08:17:48	08:31:49	sci. ampl. is changed for qdc.
6101	on	08:48:59	09:04:14
6102	on	09:08:27	09:53:58	sci. ADC ch#9
6103	on	09:55:21	10:05:19	beam is off
6104	on	10:06:48	10:54:21
6105	on	10:55:08	11:43:05
6106	on	11:44:06	13:34:49
6113	on	16:28:10	16:56:49	spec. amp. 500

09/25/13 BeamOn shutter open 2.6_3.2kV

ADC : GEM CH#5, Scintillator 9

TDC: GEM CH#27,31,28 , Scintillator 29

PS-ADC: GEM CH#15

Run Number	Beam	Start Time	End time	Notes
6107	on	13:37:21	13:51:33	peak sensing at low channel number
6108	on	13:52:19	14:08:42	spectroscopic amplifier 100->200 coarse amp.
6109	on	14:09:21	14:55:48	spectroscopic amplifier 200->500 coarse amp.
6110	on	14:56:39	15:26:26	spectroscopic amplifier 200->500 coarse amp.
6111	on	15:30:40	15:56:29	spectroscopic amplifier 200->500 coarse amp.
6112	on	15:57:18	16:25:24	spectroscopic amplifier 200->500 coarse amp.

09/26/13 BeamOn shutter close 2.7_3.3kV

ADC : GEM CH#5, Scintillator 9

TDC: GEM CH#27,31,28 , Scintillator 29

PS-ADC: GEM CH#15

Run Number	Beam	Start Time	End time	Notes
6118	on	07:27:40	07:41:06	peak sensing at ch#100, but ADC still has two peaks.ch# 1374 and ch#1553! voltage of GEM = voltage of cathode = 2.7kV, osciloscope does not show any signal for GEM.
6122	on	08:22:59	09:01:28
6123	on	09:03:21	09:44:26
6124	on	09:51:51	10:22:48
6125	on	10:26:06	10:59:21	spec. amplif. changed 15-> 7.1 fine amp. 200 coarse overflow for Peak sensing
6126	on	11:02:13	11:15:37	spec. amplif. changed 7.1-> 7.4
6127	on	11:17:04	11:51:21	overflow for Peak sensing
6128	on	11:52:28	12:51:03	overflow for Peak sensing
6129	on	12:52:02	13:14:32	overflow for Peak sensing

09/26/13 BeamOn shutter close 2.6_3.2kV

ADC : GEM CH#5, Scintillator 9

TDC: GEM CH#27,31,28 , Scintillator 29

PS-ADC: GEM CH#15

Run Number	Beam	Start Time	End time	Notes
6133	on	13:21:00	13:24:49	peak sensing at ch#100,
6134	on	13:26:23	13:30:20	spec. amp 200->100
6136	on	13:33:18	13:43:14	9' 56" spec. amp 200->100 fine from 7.4 ->10
6138	on	13:47:19	13:57:10	10' 9"
6140	on	14:00:55	14:10:55	10'
6147	on	15:10:12	15:22:20	spec. amp fine 10->5
6148	on	15:23:16	15:38:57	spec. amp fine 5->7.4
6149	on	15:40:40	15:51:23
6151	on	15:53:13	16:04:06

09/26/13 BeamOn shutter close 2.7_3.3kV

ADC : GEM CH#5, Scintillator 9

TDC: GEM CH#27,31,28 , Scintillator 29

PS-ADC: GEM CH#15

Run Number	Beam	Start Time	End time	Notes
6142	on	14:14:34	14:24:37	10' 3" differetnce between the peak of the two measurements is not enough to repeat using the new spc. amp new settings but the previous settings overflow the peak sensing!!!
6144	on	14:29:47	14:40:35	10' 48"
6145	on	14:44:10	14:55:24	11' 14"
6146	on	14:56:14	15:07:50	11' 36"

09/26/13 BeamOn shutter close 2.8_3.4kV

ADC : GEM CH#5, Scintillator 9

TDC: GEM CH#27,31,28 , Scintillator 29

PS-ADC: GEM CH#15

Run Number	Beam	Start Time	End time	Notes
6152	on	14:12:41	16:23:54	11' 13"
6153	on	16:24:45	16:34:37	10' 48"
6156	on	16:39:16	16:49:13	9' 57"
6157	on	16:49:35	17:07:14	17'39"

09/27/13 BeamOn shutter open 2.8_3.4kV

ADC : GEM CH#5, Scintillator 9

TDC: GEM CH#27,31,28 , Scintillator 29

PS-ADC: GEM CH#15

Run Number	Beam	Start Time	End time	Notes
6159	on	08:38:06	08:47:59	9' 53"
6160	on	08:48:27	09:10:11	21 43"
6161	on	09:11:10	09:21:25	10' 15"
6162	on	09:23:23	09:33:18

09/27/13 BeamOn shutter open 2.7_3.3kV

ADC : GEM CH#5, Scintillator 9

TDC: GEM CH#27,31,28 , Scintillator 29

PS-ADC: GEM CH#15

Run Number	Beam	Start Time	End time	Notes
6163	on	09:34:52	09:42:01
6164	on	09:42:34	09:59:17
6165	on	09:59:49	10:28:55
6166	on	10:29:31	10:45:57

09/27/13 BeamOn shutter open 2.6_3.2kV

ADC : GEM CH#5, Scintillator 9

TDC: GEM CH#27,31,28 , Scintillator 29

PS-ADC: GEM CH#15

Run Number	Beam	Start Time	End time	Notes
6167	on	10:47:49	11:00:06
6168	on	11:00:46	11:13:33
6169	on	11:14:31	11:24:36
6170	on	11:25:15	11:29:34
6171	on	11:30:22	11:41:52

09/27/13 BeamOn shutter open 2.7_3.4kV

ADC : GEM CH#5, Scintillator 9

TDC: GEM CH#27,31,28 , Scintillator 29

PS-ADC: GEM CH#15

Run Number	Beam	Start Time	End time	Notes
6172	on	11:45:35	11:55:27
6173	on	11:55:49	12:03:25

09/27/13 BeamOn shutter open 2.7_3.2kV

ADC : GEM CH#5, Scintillator 9

TDC: GEM CH#27,31,28 , Scintillator 29

PS-ADC: GEM CH#15

Run Number	Beam	Start Time	End time	Notes
6174	on	12:04:42	12:13:11
6175	on	12:13:30	12:22:40

09/27/13 BeamOn shutter open 2.7_3.1kV

ADC : GEM CH#5, Scintillator 9

TDC: GEM CH#27,31,28 , Scintillator 29

PS-ADC: GEM CH#15

Run Number	Beam	Start Time	End time	Notes
6176	on	12:24:58	12:50:30

09/27/13 BeamOn shutter open 2.8_3.4kV

TDC settings is changed for the scintillator.

Run Number	Beam	Start Time	End time	Notes
6184	on	13:55:53	15:45:08
6185	on	15:45:46	16:00:06
6186	on	16:02:10	16:05:10	[math] V_{cath} = V_{GEM} [/math]
6187	on	16:06:26	16:19:15
6188	on	16:20:26	17:14:21	shutter is close, ended 4 min. after the beam is off [math] V_{cath} = V_{GEM} [/math]

Analysis

Main points:

1. TDC settings, comon start, common stop mode.
2. TDC range.
3. changing the TDC settings. and source of TDC hits. (logic fold and dual timer and the effect of the delay)
4. The difference in time scale between the oold and the new TDC settings (scintillator time)
5. write a program for direct analysis of neutron spectrum based on TDC and QDC, and TDC and Peak sensing ADC.
6. The best best GEM operating voltage as the beam is ON.
7. difference between the TDC histograms in the two ntuple root files.

IAC-Peak Sensing Measurements 09/01/13

IAC-Peak Sensing Measurements

IAC-QDC Measurements 09/18/13

IAC-QDC Measurements