Halls A and C Spectrometer Support Group Whiteboard

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 (Ellen/Dave G.)
• HMS dipole switch replacement (Joe)
• Cryo (Heidi)
• Spectrometer gas systems (Chandan, Bill)

Priority Items

• Replace HMS dipole switch (Joe)
• SE-II search --> now a SE-I search
• HMS drift chamber low voltage supply replacements
• Moller maintenance OSP (not needed?)
• SBS corrector OSP?
• Sieve slit controllers OSP
• VVUs on HMS
• Guards on HMS dipole leads
• Oscillator for LN2 level meter
• BigBite Argon manifold pressure sensor erratic. Need to clean the connections (this is resolved right?)
• SBS Argon pressure sensor bad?
• Some of the SBS magnet bus bars have been running hot. Do we need to re-torque them?
• Readout for LCW pressure sensors added at end of beamline walkway (not started)
• Work with Brad and Steve Lassiter to get Skylla10 moved from physical hardware to virtual machine
• Transformer for ECAL heater power. Need 480 VAC, 200A supply
• Version control software for Hall C PLC code
• VVUs for capacitor banks? I just had this idea and want to explore it as an option....
• BigBite supply polarity switch manual control

Cryo

Pump-out (CVI) replacement (Lars)

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

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

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

Troubleshoot HMS Q1 LN2 temp sensors. (Heidi)

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

Troubleshoot HMS Dipole LN2 siphon temp. (Heidi)

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

Check all JT actuators, ensure belt is functional and in the correct orientation. (Lars) Insulate HMS N2 4k shield (stinger) return line.

Insulate SHMS Warm return line across pivot. (Lars)

Repair calibrate warm return valve spares. (Lars)

Repair calibrate JT valve spares. (Lars)

Troubleshoot HMS Quad Vac gauges. (Lars)

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)

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

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

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

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

Warm up SHMS Dipole. (Heidi)

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

Repair SHMS 4k supply transfer line ball valve assembly. (Heidi/Lars)

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

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

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

Warm HMS Dipole (to 300k for lead repair) (Heidi)

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

Cool HMS Dipole.(Heidi)

Electrical

Isolating power switches on HMS power supplies

Specifications for power supplies for HKS (coordinate with Sarin)

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

Hall A Compton photon detector table motion (somebody cut the cables)

GEM low voltage distribution (Joe)

Spectrometers

Make HMS dipole NMR lock better

Hall probes/NMR (?) for HKS

Gas systems

Hall C gas shed pi rebuild (done - need PVs for alarm handler)

Possible Future Items

Reboot switch for I2C devices