June 23, 2022

Planned Accesses to the Hall

• During the accelerator full maintenance day (Thursday Jun 23, 2022)
  • S. Lassiter needs to put crush washers in LCW filters, so we may see a little bit of water by the HMS boogie for now, until he can put the washers next week, during maintenance period [https://logboo\

ks.jlab.org/entry/4003796 HMS Dipole LCW] ( PENDING ) NOTE: Actually, Heidi and Jack will will need to access Hall C to work on HMS dipole, to get dimensions befor\ e ordering the parts needed to install the crush washers.

• • Hall C drift-chamber expert will need to go to the HMS Hut to try and fix the HMS DC noise issues. Maybe better grounding is required? Or discriminator cards may need to be re-seated? ( PENDING ) See HMS DC Card Map: https://hallcweb.jlab.org/wiki/images/1/11/HMS_DriftChamberPlanesLayout.pdf and log-entry: https://logbooks.jlab.org/entry/4005562 describing whi\

ch wire groups are noisy

• • Xinzhan Bai and Jixie Zhang request to change gas bottle for solid Cherenkov detector: Contact: xbai@jlab.org, cell: (434) 422-2809 ( PENDING )

Planned Accelerator Configuration Changes

• Full accelerator maintenance day on Thursday, Jun 23. Beam will be taken away at 6:30 am

Special Requests

• Mark Jones would like to take HMS optics data with a 4x4 mm^2 raster at some point (when HMS is at a lower momentum, i.e., current setting) for checks. ( DONE </s\

pan>)

• • D. Gaskell took a run with Carbon target and raster set to 4x4 mm^2. See run https://logbooks.jlab.org/entry/4004280