| ID |
Date |
Author |
Type |
Category |
Subject |
|
63
|
03 Nov 2019 08:49 |
Alex Kish | Routine | General | run 835, zero drift field |
Gas pocket: ON
Fields: drift field OFF (1st ring 0 V, cathode 0 V), extraction field OFF (wire gate 0 V)
Threshold: 200 ADCc below baseline
Threshold extend: 5x16 = 80ns
TPC Pressure: 244 mbarg
SiPM HV: 65 V
Comment: noise conditions good, 1e5 evts |
|
64
|
03 Nov 2019 09:17 |
Alex Kish | Routine | General | run 836, zero drift field |
Gas pocket: ON
Fields: drift field OFF (1st ring 0 V, cathode 0 V), extraction field OFF (wire gate 0 V)
Threshold: 200 ADCc below baseline
Threshold extend: 5x16 = 80ns
TPC Pressure: 244 mbarg
SiPM HV: 50 V (noise run)
Comment: noise conditions good. Thresholds are too high, rate below 1 event/sec, only few events saved. Postpone to next day. |
|
65
|
04 Nov 2019 06:02 |
Alex Kish | Configuration | Hardware | Increased fields! |
Increased drift and extraction fields.
Current settings: wire gate 5100 V, 1st ring: 6100 V, cathode: 11100 V
P.S. Increased by in the morning by Yi. |
|
66
|
04 Nov 2019 07:57 |
Ben Smith | Configuration | Software | Package installations |
This morning I installed the xrootd-client and python3-devel packages from yum. For the latter to work, I needed to do a yum update. This was long overdue, and updated 1200+ packages.
I have compiled a new version of ROOT 6 that links to Python 3. This will allow us to use ROOT and midas from the same python scripts. |
|
67
|
04 Nov 2019 08:00 |
Ben Smith | Configuration | MIDAS | Change of location of history files |
/home was getting very full on ds-proto-daq, so I moved the history files onto the /data disk. There is now a symlink from ~/online/history to /data/dsproto/history/. |
|
68
|
04 Nov 2019 08:03 |
Ben Smith | Routine | Software | New script for setting self-trigger thresholds |
I have created a new script that simplifies the adjustment of self-trigger thresholds (e.g. to change between "noise" runs with a low threshold and "normal" runs with a higher threshold).
It supports either setting the threshold to a certain number of ADC beneath baseline, or just shifting all the current thresholds by a given amount. It can also be used to just print the current baseline of each channel. Baseline calculation is done "live" by reading a few events.
The code is available in dsproto_analyzer, and is documented at https://bitbucket.org/ttriumfdaq/dsproto_daq/wiki/Midas%20Software%20Operation (scroll to "Adjusting self-trigger thresholds"). We used it recently to change to a noise run, and it worked well. |
|
69
|
04 Nov 2019 09:02 |
Alex/Yi/Ben | Routine | General | run 865, fields on |
Gas pocket: ON
Fields: wire gate 3780 V, 1st ring: 4500 V, cathode: 7000 V
Threshold: 1000 ADCc below baseline
Trace length: 200us total, 100 us pre-trigger
Threshold extend: 5x16 = 80ns
TPC Pressure: 300 mbarg
SiPM HV: 65 V (noise run)
Comment: noise conditions good. Rate ~30Hz. Look for S2s! |
|
70
|
05 Nov 2019 01:22 |
Ben Smith | Configuration | Digitizer | V1725 board config |
The V1725s have been changed to have board config 0x50 rather than 0x10. This means that they will now trigger on the leading edge of the pulse rather than the tailing edge. There is now much less jitter in the location of pulses in the digitized waveforms. |
|
71
|
05 Nov 2019 04:48 |
Yi Wang | Routine | General | Run 873 |
Gas pocket: ON (thinkness unknown, since the TPC pressure is >200 mbar)
Fields: drift 500V/cm extraction 3.78kV/cm
Threshold: 1600 ADC below baseline
Trace length: 200us total, 100 us pre-trigger
Threshold extend: 5x16 = 80ns
TPC Pressure: >200 mbarg
SiPM HV: 65 V
Comment: try to trigger on S2 |
|
72
|
05 Nov 2019 04:57 |
Yi Wang | Routine | General | Run 875 |
Gas pocket: ON (thinkness unknown, since the TPC pressure is >200 mbar)
Fields: OFF
Threshold: 1600 ADC below baseline
Trace length: 200us total, 100 us pre-trigger
Threshold extend: 5x16 = 80ns
TPC Pressure: >200 mbarg
SiPM HV: 65 V
Comment: compare to Run 873 |
|
73
|
05 Nov 2019 05:09 |
Yi Wang | Routine | General | Run 877 |
Gas pocket: ON (thinkness unknown, since the TPC pressure is >200 mbar)
Fields: drift 200 V/cm, extraction 2.8 kV/cm
Threshold: 1600 ADC below baseline
Trace length: 200us total, 100 us pre-trigger
Threshold extend: 5x16 = 80ns
TPC Pressure: >200 mbarg
SiPM HV: 65 V
Comment: compare to Run 873, 875 |
|
74
|
05 Nov 2019 05:43 |
Ben Smith | Routine | Software | New script to equalize baselines |
I've written a new script that will set all the V1725 baselines to the same level, by adjusting the DAC values. All the baselines are currently set to 15500.
The script is documented in the "Adjusting V1725 baselines" section of https://bitbucket.org/ttriumfdaq/dsproto_daq/wiki/Midas%20Software%20Operation.
I also added a new option to the "adjust self trigger threshold" script that allows the user to specify an exact ADC threshold (rather than doing it in relation to baseline). E.g. if you know that the baselines are all currently 15500, and you want to set a threshold ~200mV below, you could set a self-trigger threshold of 13900 (1mV is ~ 8ADC). |
|
75
|
05 Nov 2019 06:36 |
Alex / Ben | Routine | General | Run 885, baseline run with SiPMs at 65V |
Gas pocket: ON (thinkness unknown, since the TPC pressure is >200 mbar)
Fields: drift 200 V/cm, extraction 2.8 kV/cm
Threshold: external clock, 50Hz
Trace length: 500us total, 100 us pre-trigger
Threshold extend: 5x16 = 80ns
TPC Pressure: >460 mbarg
SiPM HV: 65 V
Comment: DAQ rate ~25Hz |
|
76
|
05 Nov 2019 06:42 |
Alex / Ben | Routine | General | Run 886, baseline run with SiPMs at 50V |
Gas pocket: ON (thinkness unknown, since the TPC pressure is >200 mbar)
Fields: drift 200 V/cm, extraction 2.8 kV/cm
Threshold: external clock, 50Hz
Trace length: 500us total, 100 us pre-trigger
Threshold extend: 5x16 = 80ns
TPC Pressure: >460 mbarg
SiPM HV: 50 V
Comment: data rate capped at 25Hz due to limited speed of writing on disk. 1ms traces are not possible yet. |
|
77
|
05 Nov 2019 06:55 |
Alex / Ben | Routine | General | Run 888, laser run with SiPMs at 65V |
Laser intensity: MAX
Gas pocket: ON (thinkness unknown, since the TPC pressure is >200 mbar)
Fields: drift 200 V/cm, extraction 2.8 kV/cm
Threshold: external clock (laser NIM), 500Hz (laser set to 1kHz)
Trace length: 500us total, 100 us pre-trigger
Threshold extend: 5x16 = 80ns
TPC Pressure: >460 mbarg
SiPM HV: 65 V
Comment: |
|
78
|
05 Nov 2019 06:56 |
Alex / Ben | Routine | General | Run 889, laser run with SiPMs at 67V |
Laser intensity: MAX
Gas pocket: ON (thinkness unknown, since the TPC pressure is >200 mbar)
Fields: drift 200 V/cm, extraction 2.8 kV/cm
Threshold: external clock (laser NIM), 500Hz (laser set to 1kHz)
Trace length: 12us total, 5us pre-trigger
Threshold extend: 5x16 = 80ns
TPC Pressure: >460 mbarg
SiPM HV: 65 V
Comment: |
|
79
|
05 Nov 2019 07:05 |
Alex / Ben / Sam | Routine | General | Run 891, laser run with SiPMs at 67V |
Laser intensity: MIN
Gas pocket: ON (thinkness unknown, since the TPC pressure is >200 mbar)
Fields: drift 200 V/cm, extraction 2.8 kV/cm
Threshold: external clock (laser NIM), 500Hz (laser set to 1kHz)
Trace length: 12us total, 5us pre-trigger
Threshold extend: 5x16 = 80ns
TPC Pressure: >460 mbarg
SiPM HV: 67 V
Comment: |
|
80
|
05 Nov 2019 07:23 |
Alex / Ben / Sam | Routine | General | Run 893, laser run with SiPMs at 65V, 30us trace |
Laser intensity: MAX
Gas pocket: ON (thinkness unknown, since the TPC pressure is >200 mbar)
Fields: drift 200 V/cm, extraction 2.8 kV/cm
Threshold: external clock (laser NIM), 500Hz (laser set to 1kHz)
Trace length: 30us total, 5us pre-trigger
Threshold extend: 5x16 = 80ns
TPC Pressure: >460 mbarg
SiPM HV: 65 V
Comment: |
|
81
|
05 Nov 2019 07:24 |
Alex / Ben / Sam | Routine | General | Run 892, laser run with SiPMs at 65V |
Laser intensity: MIN
Gas pocket: ON (thinkness unknown, since the TPC pressure is >200 mbar)
Fields: drift 200 V/cm, extraction 2.8 kV/cm
Threshold: external clock (laser NIM), 500Hz (laser set to 1kHz)
Trace length: 12us total, 5us pre-trigger
Threshold extend: 5x16 = 80ns
TPC Pressure: >460 mbarg
SiPM HV: 65 V
Comment: |
|
82
|
05 Nov 2019 07:26 |
Alex / Ben / Sam | Routine | General | Run 894, laser run with SiPMs at 67V, 30us trace |
Laser intensity: MAX
Gas pocket: ON (thinkness unknown, since the TPC pressure is >200 mbar)
Fields: drift 200 V/cm, extraction 2.8 kV/cm
Threshold: external clock (laser NIM), 500Hz (laser set to 1kHz)
Trace length: 30us total, 5us pre-trigger
Threshold extend: 5x16 = 80ns
TPC Pressure: >460 mbarg
SiPM HV: 67 V
Comment: |