Halls A and C Spectrometer Support Group Whiteboard

Work delayed by LOTO pause

• SBS power supply troubleshooting (Friday, May 24)
• SHMS cooldown (Tuesday, May 28)
• Hall A Compton laser work (Wednesday, May 29)
• Hall C: NPS magnet removal
• Hall A: BigBite removal
• Compton photon table work

Admin locks applied for longer than 1 week (please list below)

•  ??

ePAS permits

• ePAS info in the EH&S manual: https://www.jlab.org/ehs/ehsmanual/ePAS__manual%20section%202_rev0.htm
• Hall C Moller - operation and measurement: JLab-PTW-1307
• Compton laser lab: JLab-PTW-1098
• Hall A Compton: JLab-PTW-1359
• NPS power supply LOCAL operation: JLab-PTW-1617
• NPS correctors - LOCAL operation: JLab-PTW-1638
• HMS Quads: JLAB-PTW-1699
• HMS Dipole: JLAB-PTW-1701
• SBS power supply LOCAL operation: JLAB-PTW-1703
• SBS corrector LOCAL operation JLAB-PTW-1722
• Power supply repair and maintenance (Ellen)
• Hall C Spectrometer rotation reset JLAB-PTW-1723
• Hall C Spectrometer rotation (remote or local) JLAB-PTW-1605-rev1
• Grinch (Big Bite): JLAb-PTW-2148
• Cryo Heidi JLAB-PR-1203
• Spectrometer gas systems (Chandan, Bill)
• Tabletop electronic troubleshooting (Mode 1 and 2) JLAB-PTW-????

Hall A Work for GEP (next SAD)

• Moller dipole power supply in service building (Onish)
• Power for ECAL racks - 10 NIM crates, up to 300 W each - electricians brought in ,COMPLETE
• Transformer for ECAL heater power. Need 480 VAC, 200A supply, COMPLETE
• E-STOP button for ECAL heaters - need to run cable
• More GEM low voltage - BB GEMS are moving to SBS - Complete
• Interlock switches for ECAL panels (Sam/Ellen) - in progress
• Moller magnet vacuum (Ellen) -in progress
• Compton laser mirror replacement (Dave w/help from Lars) - CANCELLED
• Compton photon detector table repair (Sam) - in progress
• Compton laser polarization measurement (Sam), COMPLETE
• Pull all Hall A left arm U-tubes, install jumper to N2 return. (heidi-Paperwork in progress)
• Decommission left arm supplies (Heidi-work request submitted)
• MOLLER prep: relocate 480 junction box, identify cables above beamline: update EPAS
• SBS regulation (Joe ++) - epas in progress
• ECAL connector soldering (Lars), COMPLETE
• GEM gas line repair (Lars), COMPLETE
• Add rails to rack (Lars), COMPLETE
• Nitrogen dewar for GEMS (Lars) COMPLETE

Hall C Work for LAD

• Power for GEM racks (COMPLETE?)
• NPS calorimeter and sweeper removal (COMPLETE)
• All the things for getting SHMS working again - bender will be reinstalled (all). See Cryo "SAD" list below
• Figure out SHMS encoder drift - no drift since the run
• hall C moller compressor comms and filter - comms fixed (mostly)
• remove NDX detectors from hall C (COMPLETE)
• Guards on HMS dipole leads-(Lars) - complete?
• HMS drift chamber low voltage supply replacements, COMPLETE
• HMS Shield door motor drive replacement - check critical memory positions first - COMPLETE
• Rotation shunt-trip breakers: replace or buy spares (COMPLETE)
• Get circuit breaker reset stick (Steve L. suggestion)
• Label and track NPS equipment (Lars)

Priority Items

• Version control software for Hall C PLC code (Ellen)

Cryo

Build local valve control boxes with local read out. (Heidi-in progress)

op check/repair hall C vacuum gauges (in progress - Lars)

Insulate HMS N2 4k shield (stinger) return line.(Lars)

Repair calibrate JT valve spares. (Lars)

Update code for the new temperature sensor installed on the HX N2 vent on the HMS. (Ellen?)

Check penning gauges on HMS Quads (software or hardware problem?) (Ellen/Lars)

PLC/Code changes (Heidi/Ellen-in progress)

Assemble L Tube/relief valve assembly (Lars)

U-Tube ePass/fall protection, Hall A (Heidi) -Paperwork submitted

Remove all hal A left arm U-tubes

SAD

Warm HMS Dipole to 90K and pump

Troubleshoot/repair HMS DI He in and He 3 temp sensors -Done

Troubleshoot HMS Q1 LN2 temp sensors. (Heidi-SAD)

Check HMS Quad magnet leads for leaks/repair. (Heidi-SAD)

Troubleshoot HMS Dipole LN2 siphon temp. (Heidi-SAD)

Troubleshoot HMS Q1 PT-17/PT-18 temp sensors. (Heidi-SAD)

Install environmental splices SHMS Dipole liquid level line (Heidi-SAD)

Cool SHMS Dipole, Q3, Q2, Q1. (Heidi)

After HB magnet electronics controls installation complete, cool HB Magnet. (Heidi)

Repair lead leak on HMS Dipole leads.(Heidi/Lars)

Cool HMS Dipole.(Heidi)

Insulate stinger N2 return line (Lars)

Add "T's" and pump out ports to HMS magnet vacuum gauge ports. (Lars)

Move temps from Honeywell to PLC controls. (if channels are available)

Extend HMS Q1 warm return control wires and re-terminate/calibrate. (Heidi-pigtail made/SAD)

Remove actuators from right and left arm magnets (Hall A). (Dipole/Q3 complete) (Heidi, Lars)

Pump-out (CVI) replacement (Larry)-on hold

Install new lead flow controller HMS Dipole (Heidi)

Not This SAD

De-sting SHMS 4k He supply transfer line. (Heidi)- De-sting SHMS DI 4k He supply line. (Heidi)?

Repair SHMS 4k supply transfer line ball valve assembly. (Heidi/Lars) Install new PHPK vac valve (techs)

Re-sting SHMS 4k transfer line/DI 4k supply. (Heidi)

Move the SHMS lead flow controllers and coordinate with the Cryo group (need engineering support).

SHMS Lead flow, - add upstream valves to isolate each lead flow, for easier replacement of valve/flow meter. (install when meters are moved to new location-need engineering /design support)

Electrical

Isolating power switches on HMS power supplies, maybe

Specifications for power supplies for HKS (coordinate with Onish)

Get Unser repaired --> not possible. Dave Mack took to Fast Electronics

capacitor bank VVUs for hall A magnets (Ellen/Sam)

check/label HMS quad pivot cabinet with proper electrical labels if needed

Spectrometers

Make HMS dipole NMR lock better, replace gain pot with spare?

Finish refurbishing NMR multiplexer for hall C

Rotation software improvement for hall C

hms quad vacuum gauges not working

Hall probes/NMR (?) for HKS

Add 2nd raspberry pi for HMS prescale

Possible Future Items

Reboot switch for I2C devices