Latest revision as of 15:38, 9 October 2024

Meeting time and location:

• 10:00 am EDT (JLab time) hybrid: Hall D Counting House and Zoom
• Connection information

Action Items

1. Refine timelines and GANTT chart with Sasha. Solidify dark room complete closure and plan cosmics.

• • FCAL2 Schedule

1. Work on IOC.
2. Measure waveforms.
3. Proper setup for cosmics.
4. Reactivate interlock.
5. Create Teams project calendar.

Agenda

1. Announcements
2. Action Items
3. Detector
4. Mechanical
5. Electrical
6. Electronics/DAQ
7. Any other business

Minutes

Attendees: Tim, Malte, Josh, Scot, Matt, Eugene, Mark, Hovanes, Zisis

1. Announcements:
   1. Eugene brought up that ordering even small components now goes through GSS (General Supplies and Services - customer service division) with a typical turn around time of 1 week. (Read: no more trips to Home Depot for small items).
2. Action Items:
   1. GANTT:
      1. Tim updated the chart with info from Sasha and assigned responsible persons (e.g. ECAL Sasha, TOF Beni, etc).
      2. Tim and Scot reported that work is ongoing for the test enclosure and the date has been pushed from 10/7 to 10/15. Once that is up, Sasha will arrange connectors and cables. The actual enclosure arrives on 10/31, so there will be a week of testing in between.
      3. IOC: Hovanes and Malte worked on this; it took about 2 days to debug. The FCAL view shows that the blocks are good with the exception of two inactive regions, that were traced to connectors that were installed reversed (180 deg) which causes a 24 V short to ground. This will be fixed.

1. 1. 1. Cosmics: Malte emailed Elton to see if the panels used in 2015 for the BCAL/CDC were still around (Hall B?). Beni will be contacted. Mark mentioned that Qweak had paddles. Mark made the case that it is best to get the DAQ operational (see below).
      2. Calendar: Malte created a Google calendar to plan FCAL2 work (and dark room access) a few days in advance of activities. He can give edit privileges to those interested.
2. Detector
   1. Besides the above inactive regions, only 5 blocks are not working and these will be checked. Malte made a new snap file for the voltages and brought up the detector to 200 V to check comms.
3. Mechanical
   1. Safety: the last (before beam comes) audit was done yesterday; waiting for the results.
   2. Procurement left: HV panels
   3. Chillers: new clamp-on (ultrasound) flow meters were installed; specs are 30 gallons/min and 30 psi, but only 20 gal/min is reached and that drops to 13 when the mechanical flows meters are not by passed (perhaps they need to be removed). Tim has done Delta-Temp calculations to compensate for the lower flow. The system was run all day yesterday at 19-20 C and the aluminum blocks were cooled but no noticeable change in the xtal temps. The system will be set to 15 C for full test and thermal imaging cameras will be installed. A dehumidifier will also be installed. Malte showed the FCAL/ECAL Environment CSS with the temp sensor locations. Malte, Matt and Eugene commented on scintillation light yield of PbWO4 as a function of temp gradient across the xtal's length, and that the longitudinal shower profile gets affected (non-linearity is a function of energy deposited); thought needs to go on how correct for this in simulations/analysis.
      1. Interlock: Malte reported the work on the Interlock and showed the CSS panel: door bonds, crash button. The steps are a bit different than before, but the procedure is more robust in ensuring no unscheduled/accidental entry into the dark room.
      2. Emergency exit: a reminder that the kick out panel still exists on the north side of the dark room.
4. Electrical: the electricians will be contacted to get an update on when the electrical panels will be installed.
5. Electronics/DAQ:
   1. Eugene reported that re-establishing the DAQ needs a lot of reworking of all components: SSP, TS, DTP, etc. Malte will get an updated timetable from Serguei.
6. Any other business
   1. Malte asked about the LMS issues reported in last weeks JEF meeting. Zisis summarized Sasha's report on not enough light coming through to the detector. Eugene commented that this needs to be resolved and that we do not need absolute uniformity across the ECAL face but we need relative monitoring.
   2. Malte pointed out the fan control module's green LEDs in the dark room. Those need to be covered.
   3. We reaffirmed that the FCAL2 and CALWG meetings are where the work and readiness of the detector will continue to be discussed until beam comes.