VELO

#10580 VELO cooling warnings

Started at 2017-10-11 20:42. Severity: Unknown. 2 comments

2017-10-17 07:41 Alex Pearce Several persistent warnings related to VELO cooling: 1. "End tr line inlet dbox", low pressure at end of transfer line; 2. "Compressor suction", compressor suction temperature is high; 3. "Compressor discharge", compressor discharge temperature is high. Initial reports: 1. https://lblogbook.cern.ch/Shift/122992 2. https://lblogbook.cern.ch/Shift/122994 3. https://lblogbook.cern.ch/Shift/122997 Those reports say that VELO experts think the warnings are OK, given the trends and current pressure/temperature levels.
2017-10-18 19:30 Valery Zhukov Also seen as a sporadic error in the VELOC ACCU heater

TT

#10678 Empty bin in TT cluster map (from Presenter page /Shift/TT: Clusters)

Started at 2017-10-29 22:10. Severity: Report. 2 comments

2017-10-29 22:10 Angelo Carbone There is an empty bin in the TT cluster map TTaU,C-side close to the beampipe region. This seems to be there since a while (looking to previous run).
2017-10-29 22:21 Angelo Carbone We called the piquet and they said that this is known issue (i.e. the sensor is disable), but for some reason the empty is not masked.

OT

#10935 strange OT drift time distribution (from Presenter page /Shift/OT: Summary)

Started at 2017-11-16 12:25. Severity: Report. 1 comments

2017-11-16 12:25 Dmitry Golubkov strange OT drift time distribution (from Presenter page /Shift/OT: Summary)

#10916 L0Id and BxID error in T3L0 (from Presenter page /Shift/OT: Errors)

Started at 2017-11-16 08:32. Severity: Report. 1 comments

2017-11-16 08:32 Dmitry Golubkov another L0Id and BxID error again in Q3 T3L0 (T2L3M12)

#10934 OT errors in T3L0 (from Presenter page /Shift/OT: Errors)

Started at 2017-11-16 07:11. Severity: Report. 1 comments

2017-11-16 07:11 Dmitry Golubkov changed run due to detector-wide error joined after a minute by L0Id in T3L0 (didn't dissapera by itself)

MUON

#10874 Low # hits in M4C19C (from Presenter page /Shift/MUON:5.Hit Density Maps M3-M5)

Started at 2017-11-12 10:04. Severity: Minor. 4 comments

2017-11-12 10:04 Vitalii Lisovskyi Since run 202113, on cell in M4C19 has low number of hits.
2017-11-12 10:07 Vitalii Lisovskyi Updated the problem report and changed 1 fields (Title).
2017-11-13 11:34 Oleg Maev It's due to very high thresholds on noisy FEB01. FEB will be replaced in WS
2017-11-13 11:35 Oleg Maev Updated the problem report and changed 1 fields (Severity). 'Severity' changed from 'Report' to 'Minor'

#10814 Low efficiency GEM in M1 (from Presenter page /Shift/MUON:4.Hit Density Maps M1-M2)

Started at 2017-11-09 02:00. Severity: Minor. 5 comments

2017-11-09 04:19 Aleksandr Petrov 80% efficiency for M1A18C and M1A15C (experts are aware)
2017-11-09 10:01 Oleg Maev Second GEM on C-side with low (80%) efficiency - M1C15A2. Under training now. M1C18A1 has been reported already.
2017-11-09 10:01 Oleg Maev Updated the problem report and changed 1 fields (Started At).
2017-11-09 10:02 Oleg Maev Updated the problem report and changed 1 fields (Severity). 'Severity' changed from 'Report' to 'Minor'
2017-11-16 09:35 Matteo Palutan this GEM inefficiency is also visible in the HIT_by_ODE histogram, the interested ODE being Q3R1_2 and Q1R1_3

#10156 M1 muon station (from Presenter page /Shift/MUON:4.Hit Density Maps M1-M2)

Started at 2017-08-14 03:45. Severity: Minor. 3 comments

2017-08-14 03:45 Meriem Boubdir The issue with the hole in the inner region of M1 station remains. Issue reported before under message ID 117004.
2017-08-14 10:43 Oleg Maev Unfortunately, we lost configuration on 8 FEBs in CMB M1AR2_16A3. Problem on the chamber side and we can't fix it without opening M1 station. Problem will be open up to the end of year.
2017-08-14 10:47 Oleg Maev Updated the problem report and changed 1 fields (Severity). 'Severity' changed from 'Report' to 'Minor'

L0

#10894 L0Calo monitoring plots not filled (from Presenter page /Shift/L0CALO: Status)

Started at 2017-11-14 08:18. Severity: Report. 1 comments

2017-11-14 08:18 Dominik Stefan Mitzel The monitoring plots are not filled at all. Called the L0 piquet who will investigate the issue.