General Meeting Summary 4/14/22
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PARTICIPANTS: Aaron Brown, Alexandre Camsonne, Charles Hyde, Arshak Asaturyan, Fernando Barbosa, Carlos Munoz-Camacho, Tanja Horn, Rolf Ent, Abishek Karki, Brad Sawatzky, Erik Wrighton, Hamlet Mkrtchyan, Steven Lassiter, Marie Boer, Vladimir Berdnikov, Paulo Medeiros
HV DIVIDERS
- received ten first articles - tested - matched the reference
- proceeded with production - some delays with Samtex connectors, but resolved now
- in process of assembling - ~20% complete - expect to the on schedule
FRAME TEMPERATURE AND HUMIDITY SENSORS
- DSG provided model - each sensor requires 4 slots in the keysight terminal block
- Determine if enough space for cables etc. inside the enclosure
- 24 (12x2) slots available in front 2 blocks
- instead of placing humidity sensors inside on the frame attach them on the panel at front
- at back no issue - enough space - need long cables though
- Need to purchase: sensors, boards, cables
- Action item: send drawings and any other information to Aaron
- Also needed: modification of the top plate/panel
- Brad can coordinate
UPDATES FROM DSG
- EPICS HV Controls
- Impact of cooling shell (10 degC) - thermal analysis with no continous heat load (at ambient temperature) - 210 crystals in central zone hottest (between 19.0 and 20.5 degC)
- concentrated at back - impacts only tail of shower
- need to review longitudinal heat map
- any impact on resolution?
- still need to include cooling at back
- assume 0.5 W/channel,
- Carbon fiber thermal conductivity
- .5523w/m*degc
- back mu metal has higher conductivity (19 W/m*K)
- Is there an option to turn on/off HV row by row (or column by column)
- working on turning off all channels for one module
- Air flow at back of the crystals, no flow at front part of crystal
- Model air as fluid? - not yet
- Action items
- collect all information in repository
- evaluate if the material could be published in a journal
MECHANICAL/ENGINEERING
- NPS deck has been installed almost completely
- Stairs in place - needs to be mounted
- Note: it's a temporary fitting - needs to be taken off again for rotation to reach 5 deg angle in PionLT
INSTALLATION SCHEDULE
- Revisited to assist with scheduling the next experiments in Hall C
- 41 days from beam off (1 March 2023) until all support structures ready (HB removal, take down beam line, platform install and fitting, cable tray layout, cable connections, etc.) - total is ~2-3 months
- Roof block - presently consider modifying existing roof block
- Mechanically can be ready by 1 May 2023 - assume until 29 May 2023 for cable hookup and checkout
- Experiment schedule - will NPS experiment be scheduled or need to go for Jeopardy
ASSEMBLY PREPARATIONS
- Assembly space - on track to be available at end of April
- Shelving - request was put in, but not yet available - alternatives available
- Action item:
- Brad and Vladimir will further discuss offline
- Onsite personnel - in particular for May as this is where crystal wrapping has to be completed before the IJCLab-Orsay team arrives for stacking
- for wrapping ideally need two shifts of ~4 hours each per day with each shift 2-3 people
- so far the following teams have indicated availability: AANL (2), CUA (2-3), DSG (1-2 at the end of May only)
- close, but still room for additional collaborators - will follow up by email
- Action items:
- collect number of collaborators on site in May
- organize a shift schedule for the crystal wrapping
- Safety documents preparation - Brad will check
- DAQ/Electronics and Analyzer
- moving forward
- meeting every 1-2 weeks organized by David Hamilton
NEXT MEETING: THURSDAY MAY 12 AT 9:00AM ET