Transcription of paper logbook for runs. Please check as I cannot read all the writing.
Wednesday 13/9/2017
Detectors installed:
2083-9, 74 um, dE layer
3080-23, 1012 um, E layer
2410-23, 65 um, HI layer
Det. Bias Leak
dE -24 0.46
E -350 2.61
HI -14 1.05
Runs 0 - 5 : junk
Run 10
Header: Alpha calibration
Date: 13/9/2017
Start: 18:03 (CERN)
Stop: 18:12
Note: Some cables disconnected to test CANNOT READ
Run 11
Header: Alpha calibration
Date: 13/9/2017
Start: 18:16
Stop:
Notes:
ADC Ch Notes
1 0-15 ok
1 16-31
2 0-15 7+8 only pulser
2 16-31 ok
3 0-15 only pulser
3 16-31 19 low gain (other notes but crossed out)
4 0-15 6 low (noise?), rest fine
4 16-31 only pulser
5 0-15 "probably okay"
5 16-31 "probably okay"
6 0-31 "probably okay"
-------
Thursday 14/9/2017
Det. Bias Leak
dE -24 0.44
E -351 2.4
HI -14 0.95
Run 12
Header:
Date: 14/9/2017
Start: 11:50
Stop: 12:08
Note: Bad. Pulser switched on through run
Run 13
Header: Pulser ON
Date: 14/9/2017
Start: 12:07
Stop:
Notes: good
ADC Notes
1 ch 0 ... bad resolution in pulser
2 ch 7,8 no alphas
3 ch 0 low gain, ch 0-15 almost only pulser but maybe shieled from alpha source & low noise
3 ch 24 low resolution
4 ch 6 no alphas, ch 7 low gain for alphas but not for pulser
4 ch 16-31 no alpha (maybe shielded & low noise)
5 okay
6 okay
TDC missing #1-32, #1-80,120,123
14:00 before turning off biases:
Det. Bias Leak
dE -24 0.4
E -351 2.15
HI -14.5 0.89
15:15 - Vent to remove dE layer
Extra SSD cable arrives
TDC mapping
Det. Side TDC ch
dE p+n 16-63
E n+n 64-79
HI p+n 80-127
Bias detectors
Det. Bias Leak
E -350 1.83
HI -14 0.8
Run 15
Header:
Date: 14/9/2017
Start: 18:22
Stop: 18:25
Notes: Bad. Pulser to 2 Hz
Run 16
Header: Alpha source in front of E detector
Date: 14/9/2017
Start: 18:31
Stop:
Notes: Bad. CANNOT READ
Run 17
Header:
Date: 14/9/2017
Start: 18:32
Stop:
Notes: Bad. ADC #4 ch 6, 7 bad.
Switch U7e8 (??) (n+n side p+n) from E detector
Problem moved -> CANNOT READ
-------
Friday 15/9/2017
10:00 bias detectors
Det. Bias Leak
E -351 2.13
HI -14.5 0.88
T: -4.9 C
P: 4.9 x 10^-6 mbar
Run 19
Header: alpha-calib of E layer 3080-23
Date: 15/9/2017
Start:
Stop:
Notes:
No TDC data ...?
ADC Ch Comments
1 0-31 Pulser (only) in all channels except ch2 which has a few counts across whole spectrum (hair)
Resolutions range from 2.0 -> 7.0
Pulser centroid ~ channel 2800 in all spectra (except ch 2 of course)
2 0-15 Pulser in all channels, ~channel 2000 (i.e. similar gains)
Resolution ~ 2.0 ch, except ch 8 sigma = 4.5 ch
2 16-31 Pulser in all channels at ~channel 3000
Resolution ~ 2.0 ch, excehpt ch 24 which is 6.7 ch & ch 16: 4.35 ch.
3 0-31 Pulser & alphas in all channels
(Not 19...see below)
Resolution is *poor* in ch0
All gains look similar
Alpha spectra in similar channel numbers as for other ADCs, but pulser at only 1/2 the channel number
(A drawing is given to compare ch0 to ch1-15.)
3 19 Gain seems very low
Pulser @ channel 430, alphas @ channel 200
So about 1/5 of gain of others in ADC 3 channels
4 0-15 All but ch 6 very similar (good)
ch 6: Pulser in similar channel to other spectra, but narrower (~4 ch, c.f. ~8-10 channels for other spectra.)
And alphas are much lower gain, appearing ~ ch 70, c.f. 1100 for others
4 16-31 All okay. Triple alpha @ ~ channel 1150, pulser @ 2800
5 0-31 All okay (though low gain - deliberately)
6 0-31 Ok, see above for ADC 5 notes.
Det. Bias Leak
E -351 2.08
HI -14.5 0.88
Restart MIDAS; VME crate
=> TDC signals return
12:02 Removed E layer #3080-23 (HI layer #2410-23 remains unchanged)
New 1035 um Si installed #2951-22. It uses a different bias voltage than the previous E layer (-160 vs. -351 V)
12:50 Stop DAQ (run 22 larger than necessary)
Run 23 (?? no note)
Header:
Date:
Start:
Stop:
Notes:
ADC ch Comments
1 0-15 Pulser only, similar gains
ch 2 no pulser (hair)
No alphas (unsurprising!)
1 16-31 Pulser only, similar gains
All okay.
(No alphas, unsurprising!)
2 0-31 Pulser only, no alphas, similar gains
All okay
3 0-15 Pulser + alphas
alphas in all strips
alpha similar gains and resolutions
pulser in ch 0 at ~1/2 amplitude
3 16-31 Pulser + alphas.
ch 19 pulser and alphas at much reduced channel number ~1/5 gain
4 0-15 Pulser + alphas
ch 6 no alphas - Pulser narrow (no detector capacitence?)
ch 7 alphas at reduced gain (~1/5), pulser narrow
4 16-31 All good
5 0-31 All good (low gains - by design)
6 0-31 All good (low gains - by design)
v767 #1 TDC
ch Comments
0 1 peak
1-15 No data
16-31 1 peak
32 No peaoks
33 1 peak + 1 small peak
34-44 2 peaks
45-47 1 peak
48 1 peak + hair
49-52 1 peak
53 1 peak + hair
54-56 2 peaks
57-63 1 peak
64-79 broad region of data (alphas?)
80-86 1 peak
87 1 peak + 1 smaller peak
88 Mainly 1 or 2 peaks + lots of hair
89 1 peak
90,91 2 peaks
92-95 1 peak
96 1 peak
97-127 Mainly 1 peak
Cable for 1 mm E detector must be faulty
Before opening the chamber:
Det. Bias Leak
E -160 1.12
HI -14.5 0.92
(When trying to switch the cable to the SSD, apparently it was not fully connected. Some time is lost to pump, vent, check, etc)
After new cabling is confirmed and evacuation is complete:
Det. Bias Leak
E -160 1.17
HI 14.5 0.96
Run 24
Header: Check new cable
Date: 15/9/2017
Start: 16:18 (UK)
Stop: 16:35 (UK)
Notes:
ADC ch Comments
3 0-15 okay
3 16-31 ch 19 low gain
4 0-15 ch 5, ch 7 low gain
4 16-31 okay |