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Meeting Information


To connect to the meeting, please do the following: Time: Wednesday at 9:00 AM EST.

  1. To join via a Web Browser, go to the page [1] https://bluejeans.com/984025598.
  2. To join via Polycom room system go to the IP Address: (bjn.vc) and enter the meeting ID: 984025598.
  3. To join via phone, use one of the following numbers and the Conference ID: 984025598.
    • Dial Either +1 408 740 7256 or +1 888 240 2560 for US or Canada



Long Term Schedule: Gantt (Outstanding tasks)

  1. 8/9/21 Start Hot Check-out

New items for discussion:

Short term schedule update:
This week:

Reports by Group: Experiment:

  • Past Experiment (HDIce) off floor largely; dilution refrigerator / pump cart craned out & high bay control room reconfigured for High-B. (With many thanks to install group for roofing tile gyrations!)
  • Elevated beam line decommissioned upstream of M901 quad and terminated in roughing valve.
  • COO/ESAD/RSAD prepared; committee response in progress.


  • Gun operating at 180kV w/o Field Emission following rebuild, HV conditioning, and Kr processing (Many thanks to all involved!!)
  • Many improvements and modifications made to prep chamber. New pucks prepared as well.
  • HV tests with a GaAs puck (#8) in the gun (8/3) [Carlos]
  • Gun HVPS locked out , reconnect gun valve, charge NF3, degas heater/puck, get UITF laser on (8/4)
  • Make photocathode (8/5) [Joe/Max]
  • Align laser to photocathode, using retro and QE (8/5) [Shukui]
  • Gun rebuild wiki
  • Racks and Mott crate staged for later experiments

Old insulator (punctured) & Old puck manipulator/schneedle for reference; both replaced. Very modest SF6 leak id-ed on top of HV tank; will repair when practical.

DC Power:

  • Trims:
    1. Trim magnets near gun re-cabled.
    2. Wastewater beam line trims cabled up.
    3. Trim magnets near FC#3: 401H/V (completed) & 501H/V correctors + 501 quad
  • Former PEPPo solenoid repaired, mapped, and installed.
  • Solenoid PS being installed. Supply placed, cables pulled, cabled, and LCW hooked up.
  • MHB magnet re-designation to MLH to avoid confusion: Chris Gould making nomenclature changes / Gary Croke & Michele Joyce making controls changes / Eric Forman to update Quick Reference Drawing / Shaun to take care of song sheets
  • Changes made in UED workspace for names and field maps; ready to merge soon. (Thanks Gary/Michele!)
  • Replacement of cards and utility chassis' acquired for CEBAF under way...

Instrumentation and Controls:

Viewer system status [IC; Norris / McCaughan]

    1. Recable 2 viewers in keV whose channels & hardware were appropriated for HDice (done)
    2. Reconnect IYGM401 (formerly ITV, now YAG)
    3. Drag cable and connect IYGM603 and IYGM603 (appropriated from HDice line, swapped ITV > YAG).
    4. Brian Freeman available for adViewer work for video camera for ITVM604A? Dome focusing still required...

Wire Scanners [Delacruz / Poelker]

  • IHAM703 Status (Scanner swapped out)

Chopper Controls (Windham/Lu)

  • STAC5 Controls replacement (done)
  • Encoder mapping (/10)
  • Controls transparent to user

Chopper Controls (Windham/Lu)

BPMs (Windham / Hesse / McCaughan)

  • Install new BPMs on line (completed)
  • Map DR receivers to appropriate chassis (completed)
  • Correct all naming and controls issues
  • Re-label locally.

Faraday Cups / Picoammeters (Francis)

  • FC cups 3 & 4 installed in new locations and under vacuum
  • Cables / air lines /etc pulled to new locations and installed
  • Connections removed for shielding installation per RCG.
  • Picoammeters all good - some screen work required.


  • VBVM501 & VBVM602 slow valve connections. VBVM602 is new installation.
  • VFVM401 Fast Valve installation
  • VCGM604 Cathode Gauge installed
  • VGPM401, 603, 604, and 703 NEG pumps - installation completed, activated, status of remote powering?
  • Numerous VIPs installed, functional, on EPICS, and archived.
  • Thin Ti window installed by experiment, pumped down, leak checked , and signage / PPE posted.


  • BCM project software integration under way between Musson/Seaton and Sue Witherspoon


  1. 6GHz > 1.5GHz Down-converter installed for bunch length system


  1. BLM locations being set 7/21 following this meeting
  2. FSD inputs for magnet and BCM being prepared

ME / Installation:

  1. Pb stacked; RCG required modification due to permanent shielding req delay.
  2. New designs for FC3 and FC4 with a great many thanks to Shaun for the design work and John/Xi for Pb arrangement and table construction!
  3. Songsheet being updated by Shaun; be sure to let him know when changes are made!
  4. Permanent shielding purchase in progress - FML (Russ) for most current details
  5. Unistrut mounting for cables when available
  6. Mount gas bottle rack in Labyrinth (Staged); remove gas bottles to rack.

Sys Admin:

  • 4th terminal system in Control room under assembled/rebuilt
  • Wall server configured
  • Need to configure wall monitors and install small networked printer.

2 weeks:

  • Pull Heliax from Spectrum analyzer/Control room >> Buncher

Action Items:

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