January 21, 2021 - Weekly ME meeting

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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#
Passcode : 2864   (anybody can then start the meeting)

Meeting January 21, 2021

Meeting January 14, 2021

MMF Jobs
  • DR#1 map done (1/11), DR#2 map should be done (1/12)
  • H-Wien new field clamps anneal done (1/11), H-Wien on stand Wed (1/13)
Lakshmi's update
  • Status of the remaining MQW coils
Technicoil will ship coils on 1/12/2021 (Next Tuesday) => should arrive by 1/15
  • PSS Kicker Magnet
Waiting for the Support cube drawing. The models provided in Nov 2020
Need the drawings in order to finalize the terminal block hold points for the magnet assembly
  • MQW prototype assembly issues
Looked at the assembly; took additional measurements; discussed preliminary action plan with Joe.G/Marcy and Phil.
Finalize the steps :ongoing. Should be ready soon
  • Clamp shells for assembly bake-out (preferred)
Was put on hold yesterday ( Phil /Marcy prefers baking without clamp shell)
Back-on the list
Design jobs
  • From Marcy....
This is the "old existing drawing" media:210108_Existing_AirCylinderModification.pdf
The shaft is now 8.25" or so, there is no nut that moves anymore, and the length sticking out needs to be checked.
From what Phil has described, the retracted position of the piston remains the same. The beveled piece defines the "in" position, and needs to be moved forward to define the stroke length. Then the excess of the hex rod has to be shortened to the right length, and threaded right for the turnbuckle.

Shop jobs

Meeting January 7, 2021

Quick scan from last year's punchlist
Magnet Jobs
DR => have (2), MMF measuring now with angle=0, R & L for Sarin, then details to Jay, ready for install (or more spare measurements)
H-Wien => https://wiki.jlab.org/ciswiki/index.php/WF_Wien_Filters_(200_kV_upgrade)
QW coils => (8) n 1137 for assmbly test, (8) Q/C at MMF due Friday, (16) arrive 1/16; MMF measure + clamps + temp test
PSS kicker => ordered 12/16, due 2/15, finish supports + terminal probe
Mechanical Jobs
Drawings => Chase songsheet, MHD tabs, viewer assembly, longer Wien washers, finalize? 3D model
Designs => MHD/MQW bake clamps, small outrigger laser box
Installaton => All assembly drawings, girder points?

Meeting December 17

Meeting November 19

Phase 2
  • New chopping chamber is for sure
  • Will know about rest of jobs by Christmas
Mechanical installation status
  • Gun feet are ready.....NEXT Install moves gun table to feet
  • 2I plate drilled.....NEXT Install moves 2I magnet fixture to pedestal
  • Y pedestals ready, Shaun has (3) pins for cartridges....NEXT Install moves Y-chamber to pedestals
  • Wien pedestals aligned, grouted.....NEXT need (3) cartridge pins + Wien girder (100" + 1000 lb)
  • A1/A2 pedestals aligned, grouted....NEXT need (3) cartridge pins + A1A2 girder (70" + 800 lb)
  • Any concern adding LCW manifold, air manifold, cable tray to pedestals???
Recent ME fab jobs
  • From Shaun
a. Hose clamps for v-blocks – DONE – Marcy
b. Angles cut for Y-girder – DONE –Marcy
c. Beveled viewer plates – DONE – Marcy
d. Cartridge pins – DONE – Vince.
e. Taller Wien filter angles – Submitted to machine shop.- Shaun
Y-chamber build
  • (2) rebuilt viewers (status)
  • NEG assembly (done)
  • laser window (ready)
  • Gun3 valve reworked (done)
  • vee blocks (done)
  • Test viewer in/out stroke when chamber under vacuum
Prebuncher cavity
  • clean/dry, re-test freq, set length, weld flange
  • Build 2nd cavity (Mark says OK, but w/ update port print and two-step braze)
Viewer rebuild status
Wien filter (on-going)
  • (Status) Cut/drill/finish hose clamps for vee-block vacuum/beam tube components support, Shaun give us lengths, CIS to shop
  • (Status) 3rd set of blue Wien plates in the shop
Dummy Cube (on-going)
  • (status) Dummy Cube - assemble, deliver to MMF w/ print, fit-up test, MMF measurements
  • From Lakshmi -
a. Visited MMF yesterday for coil QA.
b. According to Mike.B, all suggested tests except temp evolution studies will be done by COB today (11/19). Awaiting results for validation and to update the test plan.
A1 cube (on-going)
  • (Status...) Waiting on A1/A2 fixtures, due early week of 11/16
  • (Done) Leak check
  • Scott is back on Thu, he can test drive aperture up/down, same thing, no probs, no shorts.
A2 cube (on-going)
  • (Status...) Waiting on A1/A2 fixtures, due early week of 11/16
  • (Done) leak check
  • insert aperture, check stroke works okay, no shorts, I'd wait for coils before finalizing with S&A
DR magnet (after Thanksgiving)
  • Full magnet (2 halves) at MMF, Milhous winding second magnet now
  • Test setup : magnet + 3" pipe + screws + shims media:201118_MDRshim.pdf
PSS kicker status
  • From Lakshmi...
a. Received the preliminary drawings from ME/MD -11/16, initiated the quote request on the same day. Follow up discussions with Vendor(s) on coil manufacturing approach-ongoing.
b. One vendor informed me that they would be able to get back to us only on the week starting 11/30 ( Their staff is under self-quarantine for COVID- 19 until 11/25)
  • (status) 5" spool?
QW assembly/testing (is there a drawing package)
  • (Arrived) Wien quad crosses shipped 11/4 from CA
  • (Status) Wien quad mounting hardware due 11/18
  • (Status) Wien quad coils due 11/20
  • From Lakshmi -
a. QA winding is progressing well ( update as on 11/13). I expect the next update today.
General Wien girder build update
  • Was girder QA'd?
General A1/A2 girder build update
  • Was girder QA'd?
  • (Status) bellows spool through the MFX solenoid on the aperture girder shipped wednesday
Remaining Jobs
  • 2 Will NEG fit 25 l/sec IP on Y => Marcy will check, ask for ENG help if needed
  • 13 MHD + MQW protective clamp shells => down the road
  • 15 DR 15 deg dipole (backup) => FY21 budget updated
ME drawings
  1. wien filter cross sub-assy - DONE
  2. wien filter cross assy
  3. wien filter girder sub-assy
  4. wien filter girder assy
  5. pss kicker magnet
  6. pss kicker magnet assy
  7. aperture girder sub-assy - DONE
  8. aperture girder assy
  9. MHD protective clamp
  10. MQW protective clamp
  11. tunnel installation drawings
  12. bread board enclosure
  13. ion pump supports - DONE, ordered due week 11/23
  14. MDR shims - DONE
  15. MQW mounting structure - DONE, ordered due around Turkey-Day
  16. Update Wien magnet/chamber drawings to reflect as-built
  17. Update viewer assembly to call out the spring we use for reliable in/out
  18. Gary....as before can you dump 3D views of the regions into a folder (our last copy is Aug)
  19. Gary....as before may I copy/update from your ME folder a copy of released drawings (for remote viewing)
  20. update gun table 3d model, reflect as built