November 02, 2022 FCAL Insert Installation Meeting
From GlueXWiki
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
- 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