Difference between revisions of "November 02, 2022 FCAL Insert Installation Meeting"
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Revision as of 13:15, 3 November 2022
Meeting Time and Place
Wednesday November 02, 2022 10am At Jefferson Lab, Hall D Counting House and on Teams
Agenda
- Minutes from last meeting https://halldweb.jlab.org/wiki/index.php/October_19,_2022_FCAL_Insert_Installation_Meeting
- Discuss Lead Glass and crystal module removal/install [1] - Sasha
- Manpower and task division [2] - Sasha
- Initial testing of modules before removal - Mark D.
- Revisited removal of darkroom -
- All cables need to be removed from darkroom to be able to install new detector
- Maybe able to crane frame off platform partially assemble
- Rework for patch panels
- Cable discussion fruitful
- Option D to move cables from inner 400 cables to adjacent crate
- Remove 2 crates and move to new racks
- Abandon 200 cables
- Patch panels worked out, 2 HV and 2 LV north and south side, 1 signal feedthrough plate downstream wall
- HV and LV cable length = 20 ft
- Signal cable length = 16 ft
- Cable trays for Signal all going N-S under platform
- HV and LV cables al come from underneath also
- Monitoring system discussion
- Assembly in ESB
- Media:FCAL2_strawman_schedule.pdf
Minutes
- Reviewed minutes from last meeting
- Looked at Sasha's installation wiki page
- Showed different possible damage to wrapping of existing lead glass modules
- Is aluminum being stuck to module surface a performance issue (light yield)?
- Really no way to test now
- Need to decide threshold for re-wrapping
- Sasha proposed that him and Arshak inspect each module after removal to decide on action to be taken - Mark and Malte need to be in loop for base and pmt changes
- Possibly test light yield on first 100
- Malte asked who unstacked the original modules from BNL and what were the issues
- Looks like we will have about 500 good PMT spares
- Sasha presented manpower requirements
- would need 2 students for 30 weeks to re-wrap all old modules
- Total 11 students for 3 months will be needed for project (Eugene to check budgets)
- JLAB folks responsible for unstacking modules
- Sasha/Arshak would train students to do module refurb
- Students would label and bundle cables
- JLAB tech staff handle structure, darkroom, cable trays, racks
- JLAB electronics group handle crate installation and cabling
- Students would handle moving existing cables to adjacent crates on north and south racks
- Need to get a final list of universities supplying students
- Maybe best to downgrade the hall from RAD worker 1 to Gert only
- Sasha mentioned the need to re-strap some existing 25 micron brass strap crystal modules
- Need to start developing procedures for all aspects of the project
- Need to define workstations needed - add to Sasha's table and develop a layout
- Need to have electric power added to south side of FCAL platform
- Need to update strawman schedule with more detail including resources
- Lead glass acrylic sheet same design as original - need to remake panes for new geometry