July 9, 2020 - ME/INJ/CIS/CASA

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Meeting Info

We will meet Thursday @ 10am EDT via BlueJeans
Meeting URL (for video and/or audio call in): https://bluejeans.com/909497334
Phone number (for audio call in): 1-888-240-2560
Meeting ID: 909497334#

Week of July 9

Region 1
  • Small shed back from the shop, Bubba polishing tee/rear at home, then to S&A
  • First article solenoid to be QC's, second solenoid will shipped, Joe send mapping info, Phil give solenoid
  • Strung NEG wire Tuesday, prepping for characterization/thickness, bake then coating starting Friday...
  • Shaun says Musson's stand parts are on his desk + in shop for pick-up
Region 2
  • Joe reached out several times to dipole machine shop (June 25th), no word from them in a few weeks
  • Shaun will talk to vendor on viewer shields
  • Shaun finishing viewer top hats for Danny review
  • Danny says NEG flange due Aug 6
Region 3
  • Mike Beck finishing UITF blue wien thermal/B measurements to 20 A (went to 15 A only so far)
  • Danny, find long macor drawing (need 24 long)
  • Buncher meeting 1:30
Region 4

From Danny, in today's meeting, we should address these items:

  • did we want to make alignment fixtures for A1 and A2 cubes? => Yes
  • do we want a bellows downstream of the DP can? => Yes
  • for A2, do we want to re-use what we have there? also make a spare? do we already have spares? is there really an A1 in there?

Week of July 2

Week of June 25

  • Mike finding small shorts to ground on Wien coils
  • Solenoid first article arrived
  • Joe M. schedule meeting for field maps and probs with Wien coils
  • Carlos sends Mike assembly drawing
Region 1
  • Last antennae arrived at shipping/receiving
  • Bake of parts going well, ends next week, then NEG coating
  • Phil/Marcy have ceramics/NEG wire
Region 2
  • SG sent to get (3) garage shields fabricated w/ Vince
  • SG still working on the tophats, designed a fixture w/ same cross-
  • Bottom Y-flange ordered (heat treat)
  • Have all pumps, vacuum parts
  • JG send Danny info on the laser vacuum window
  • MS/PA talk w/ Tony about whether to redo bellows shaft/turnbuckle mechanism
Region 3
  • Joe met w/ Lakshmi, she'll start evaluating a strong QW mid-July
  • Brock done w/ copper cavities, shipping to JLab ~next, Matt syncing up with Musson
Region 4
  • Existing HD coils likely okay, Reza will confirm; Lakshmi will model coils to verify assumptions
  • Shaun/Gary want to order cube flanges; we'll pull trigger once HD design fixed
  • Danny is working on the aperture design

Week of June 11

  • brackets arrived (10) 2-3/4 and (5) 4-/12
Region 1
Region 2
  • Assembly drawing for Y-girder not yet complete
  • SG checking top-hat dwgs w/ DM
  • SG give machine shop dwg of tube to check fit-up
  • Milhous says fixtures done, coils going winding machine today
  • Proc should make order of NEG flange today (8 week delivery time)
  • Missing 2nd order (vee-block + fixture plate)
  • 2nd solenoid
  • Have 2nd yellow spool
Region 3

Last week June 4


MFX Solenoids (ETI)
  • Waiting on update on the measurements of the 1st solenoid.
  • The 2nd solenoid coils completed and passed all electrical testing.
  • In process of winding coils for the 3rd solenoid.
15 deg. bend dipole (Milhous)
  • Coil tooling is ready.
  • Coil winding will proceed week of JUN8 (when winding machine becomes available).
  • Discussing their QA process with the coils.
  • Gathered documentation on the magnet from the PR and emails.

We'll go back to work next week....

Last week May 28 talking points

Plan for the upcoming SAD and injector rebuild (Grames, Adderley, Marcy, Carlos, , Bubba, Windham)

  • a. Long list of jobs for new NEG BPM's here: https://wiki.jlab.org/ciswiki/index.php/200KV_gun_BPM%27s
  • b. Capture new solenoid on NEG pipe, NEG coat them too
  • c. Assemble new Y-chamber on girder, new bottom flange, new NEG's, finish coating that chamber
  • d. Setup vacuum chamber if Caryn is going to evaluate any windows
  • e. First or second, provide UITF Wien magnet to Meyers (Phil), hi-pot and map 3 coils pairs
  • f. Second or first, rebuild UITF Wien internals to eliminate high E-points (Bubba), finalize spacers/springs/gap (Carlos/Danny remotely)
  • g. Setup rebuilt Wien in UITF and HV test (Carlos)
  • h. Work w/ Shaun to test top-hats and garage needed for John's y-chamber design
  • i. Collect up dozens of vacuum parts, clean, and get ready for SAD (pipes, bellows, top-hats)
  • j. Work w/ Danny/Shaun/S&A to fabricate and assemble new A2 aperture on a cube
  • k. Work w/ Scott to assembly dummy of motorized A1 on new cube, ready for shutdown
  • l. 11 Collect up all the girders, supports, hardware
  • m. Build two prebuncher cavities?
  • n. Work w/ shop to capture Wien quads on crosses, weld on flanges, for tunnel viewers
  • o. Build up and vacuum test the y chamber: RGA, base pressure
  • p. Build up and test the docking chamber as needed (won’t be needed until later in the shutdown)

Last Week's Talking Points - May 21

  • Progress!
First coat of green paint on "core"
Y/Laser chamber viewers
  • Design status
Wien Filter
From Mike Beck - The 6 new "Wien" coils meet dimensional check acceptance criteria and counted turn count all as required at 2 layers x 13 turns per. Will put spread sheet with dimensional data together in coming days. Also, checked resistance on all 6, the range was consistent at ~.2 ohms. The visual quality of coils that Technicoil provided are nice in appearance.  Will conduct hipot testing when able to get back onsite and confirm the rest of QA acceptance testing, fit to core (when core arrives), and mapping required.
Wien coils in crate at MMF
MHD A1/A2 Steering Coils
PSS Kicker
  • ME model status
  • Getting quotes (2-4)
Wien quads
  • CED from Gary Croke => MQW: B'L = 15 G/A with +/- 3A limits
  • Will circulate when done