[Halla_min] Minutes of Hall A Group Meeting: January 30, 2018

[Stephanie Tysor]

Minutes of Hall A Group Meeting: January 30, 2018

1. Thia Keppel
   a. Senior Staff Meeting
     i. Property validation, physics 48% complete, slightly under average
     ii. Need to get a property pass far laptops going home…if you did one, you might have an expired one 
           (should have an email about it at some point in the past)
     iii. GEN150 has issues, property validation training, need it but wait until its fixed…must pass test 
           before actually doing your property validation – which we need also to do
     iv. They suggested going through areas, offices to find untagged items – physics not in favor of this 
           but,for now, make sure your desk is viewable
     v. Budget….just impressions….Stuart in DC last week (2/12 is our budget briefing), expect difficult times, 
           maybe FY19 worse than this year FY18
     vi. 12 GeV celebration later than February
     vii. ESR going down in Summer, need Hall plans!

2. Robin Wines
   a. SBS
     i. Continue on ECal frame analysis and drawings, provided Walter information to start BigBite 
           modifications, reviewing floor plate layout
   b. APEX
     i. Submitted PR for Q1 side plates – corrector steel, extension box support and septum support drawings 
           ready for procurement – need to do assembly drawing for correctors and analyze septum carriage
   c. PREX/CREX
     i. Met with Kent more discussion on shielding
   d. Tritium
     i. Submitted PR for beamline magnetic shielding
   e. Polarized 3He Target
     i. Design continues

3. Jessie Butler
   a. Continue to support the Tritium experiment
   b. Took 2 accesses in the hall this week; one was to move R-HRS to ~32 degrees (manually!) and the other was 
         to fix a liquid level probe/meter issue that caused the RQ2 to trip
   c. Continued to fabricate the braces and cross mounts for the HCal subassemblies
   d. Helped to pump down the Moller solenoid in the Test Lab with Ethan
   e. Documenting issues we’ve encountered and generating a to-do-list of repairs and maintenance we will need 
         to do during the summer shutdown period

4. Jack Segal
   a. Keithley Current Source Repair
     i. Replaced faulty fan in Keithley model 224 Programmable Current Source
     ii. Requested for quote for calibration service, planning to send it out
   b. HRS Cooling Fan Unit Repair/Rebuild
     i. Rebuilt cooling fan unit pulled from HRS, replaced all (3) fans. Unit ready for storage as spare. 
   c. Victor 24V Power Supply repair
     i. Replacement module on order, chassis ready for power supply installation after 4th module repaired and 
         installed.
   d. Looked at the HRS right dipole and eliminated noise on the sense lines as a likely problem. The next 
         likely culprit is overheating in the power supply.
   e. The HRS left dipole PLC again demonstrating controls problems 
   f. HRS Right Arm bogies’ control is down, likely for good. We managed a manual move. But, we will need to 
         come up with something a bit more reliable. A number of scenarios are available to be discussed

5. Run Coordinator – Vishvas Pandey




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Stephanie Tysor
Hall A Administrative Assistant
Thomas Jefferson National Accelerator Facility
(office)757-269-6005 (fax)757-269-5235