T9/PS run Daily Briefings - 3PM
Daily briefing minutes
July 31 - 32-1-A24
Communications |
UPS identified and ordered (3 UPS with 900W x 7min for DAQ PCs, 1 UPS with 450W x 7 min for 28V PS); should be delivered wednesday |
Online&DAQ Report |
CU DAQ maximum readout rate with full error parsing in the code is 300Hz average, corresponding to 4KHz instantenous rate during the spill (our spill structure is 3 x 0.4s spills every 16 s). This value will be checked with a random trigger generator (low threshold scintillator) and with the beam as soon as it gets back. |
Ric on TEM errors: come in a variety (TKR fifo full, phasing errors, parity errors ...); some are just fake errors connected to the so-called TEM-bug in the CU TEM (which are not flight). TKR fifo full errors probably connected to beam conditions producing showers in the last si det upstream the beam and before the CU (see also offline reports), in any case the almost full flags in the GTCC buffer was changed to 0X3E from 0x32 (from E Siskind) to allow for more hits in the tracker before back-pressure events and slow readout rate. Phasing errors found in 1 run only so far, so might be connected to wrong settings - a run with beam shooting across towers should be taken to check if phase errors appear in such conditions. In summary, if we keep trigger rate below 300Hz average we should run w/o errors and be limited by the AD DAQ deadtime (820 ns)
DAQ sync: tested with external veto set to 3ms, which was set to avoid CU errors in the wrong assumption that the CU DAQ readout rate is limited to 300Hz instantaneous and not average ; need to retest it w/o such limitation and with the only veto given by the AD DAQ
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Offline Report |
Benoit reported on an anomalous high number of hits in run 811, but also in another run for which the si det al frame was not in the beam |
Program |
- CU DAQ max readout rate test with random generated pulses |
Notes |
Action items |
July 30 10.30AM - T9 barrack
- List of runs (Eduardo)
- Updated shift list (luca)
- UPS for DAQ PCs and CU PS (luca and gloria)
July 29 8PM - T9 barrack
- Restart of activities
1) Ric: CU DAQ PCs restarted ok, need to switch on CU and acquire some test runs to verify DAQ hardware is ok
2) Philippe: verify XY table is working fine, initialize again to establish reference point
3) Fabio: AD DAQ is on again, test runs being taken and look ok
- List of tasks for 7/30 (no beam available)
- Online team + Sandro: provide online plots for tagger alignment and calibration
- Francesco: verify pipeline is fine and test ACD reconstruction on local PCs, test also ANC reconstruction, improvements on MC geometry in progress, measurements of beamline
- Claudia/Monica: verify offline monitor
- Eduardo: provide list of interesting runs taken so far and distribute it to analize
- Luca, Gloria: provide UPS for at least LAT-BTserver, enquiry about UPS for other DAQ machines and CU PS
- Luca, Gloria, Nicola, Eduardo: provide sketch of experimental setup, trigger setup
- Luca: new shift list with 8 hour shift and 3 people per shift (4 if possible)
July 29 - T9 barrack
Communications |
- POWER OUTAGE ON THE WHOLE CERN SITE SINCE 8AM - NO ESTIMATION ON POWER AND BEAM. After contacting the control room we decide to stop shifts until the power is back, and we meet at 8PM at T9 to check again with CR; if no changes happen we will meet again tomorrow at 8AM. |
Online&DAQ Report |
- The external trigger signal delivered to the CU had a wrong TTL polarity, resulting in the CU being triggered on the falling edge of the trigger occuring 800ns later than the rising edge; this was corrected and the external trigger signal was aligned with trigger requests from TKR and CAL. New test of DAQ sync will have to be performed to verify if we can work at higher rate (200 evts/spill was the max stable rate tested so far) |
Offline Report |
Francesco: |
Program |
- Carmelo and Sandro working on the online monitor to align and calibrate the tagger |
Notes |
- people are invited to start looking at data offline and report |
July 28 - room 13-3-005
Communications |
- Magnet failure: MNP17 colling system failure at 1AM stopped data taking for several hours but no damage on hardware. Physics restarted after 2 hours w/o silicon tagger for CAL calibrations. Magnet repaired in the morning |
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Online Report |
- DAQ sync studies going on |
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Offline Report |
Francesco: |
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Program |
- Complete DAQ sync studies |
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Notes |
- Fill elogbook |
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