Meeting Summary Notes2022

INTRODUCTION

• In Experiment Table move item E12-06-114 ("DVCS days moved from Hall A") to position #3

• included in beam time request
• part of Phase 1, but was not part of ERR in 2019
• uses the same equipment

• Hall C planning process for the next few years is ongoing

• Mark has been talking to different groups and will try to make a decision soon

• Action item: Mark check with Patrizia Rossi to get formal approval for E12-06-114

MECHANICAL DESIGN AND STATUS

• Detector support structure - components in house and ready for assembly this SAD

• Cable support: method with support running underneath the SHMS platform

• Roof block cutting planned for this SAD

• time estimate - 2 weeks (checked with Walter)
• hole will be covered up with additional shielding

• NPS installation timeframes (expectation from Project estimates)

• HB removal - 2 weeks
• HB re-install - 3 weeks
• NPS initial install (SHMS right) - 50 days
• NPS removal from right side - 3 weeks
• NPS initial install (hardware) left side - 25 days
• NPS moved from SHMS right side to left side (looking downstream) - 1 week including 3 days of radcon cooling if immediately after a run
• Moving the sweeper magnet in same side setup will take a work day with survey support

• Discussion about ground during welding to protect detectors

• welding machines will be grounded to the hall floor

• Schedule for SAD - some concerns about physics starting in June instead of July

• Action items:

• check again if grounded signals/HV cables are isolated from the frame
• Mark check with Walter and Steven L. to make sure resources are available

DETECTOR SUPPORT GROUP

• Overview of all DSG projects completed and ongoing: HV cables and testing, ESR pre-shaping, hardware monitoring, hardware interlock system (ongoing), signal monitoring, software configuration, thermal simulation (ongoing)

• HV cables

• Fabricated 40 cables, need 30, so have 10 spare HV cables
• Estimate ~30 minutes for changing HV cables (turn off all HV in crate and unplug/plug)

• Crystal temperature depends on ambient temperature - may be of interest to have additional temperature sensors on the inside of the detector box

• discussion about where these would go - not much space inside the box
• cooling is outside the frame

• Action item:

• Make model for placement of the temperature sensors inside the box and figure out cable routing

HV DIVIDERS