Meeting 2022 03 9

GMn GEM commissioning Meetings: WEDNESDAY 10:30am - 11:30am

Link to all previous meetings: GMn GEM Commissioning Meeting

Please use sbs_gems mailing list for plots/communications and HALOG entries relevant to GEMs!

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Near term work plan (all)

• Installation of HV dividers on BB: April 18 for 3 weeks, upgraded dividers on back tracker and active on front 3 layers

Update on BB GEMs(Sean, Ezekiel, Holly, Anu)

• We cannot use pedestal plots as indicators of APVs that are disconnected (see email).
• Negative signal tracking study
  • HALOG with all plots - https://logbooks.jlab.org/entry/3986717

Update on UVa GEM layers for GEn-RP (Anu, John, Thir)

• Still having issues with "gaps" or "dead zones" on inline layers
  • Possible trigger issues?? Need to step through the system and scope/check It out
  • Need to get as many GEMs/APVs up as possible to rule out any effects due to tracking.
• Connection issues with APVs on Inline Layer 3 - G3
  • We slid the layer out and re-attached/assessed the connection of the 12-slot
  • Replaced the APV on Inline Layer 4 G0 12-slot. Inline Layer 3 and 4 are on the same frame.

• EEL 125 GEM DAQ updates

Update on INFN GEM layers for GEn-RP (Ezekiel, Holly, Evaristo)

• HV divider upgrade for INFN GEMs
• First test of parallel divider
• Cosmic Run 1943
• Cosmic Run 1974

DAQ updates (Ben, Bryan, Alex)

• schematic of setup?
• FIR filter?
• Update on: need 2 DC working in Hall A