Difference between revisions of "2021-05-26"

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(Created page with "== Meeting Information == ==== Connecting ==== To connect to the meeting, please do the following: Time: Wednesday at 9:00 AM EST. # To join via a Web Browser, go to the pag...")
 
(New items for discussion:)
 
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<u>Short term schedule update:</u><br>
 
<u>Short term schedule update:</u><br>
 
<u>This week:</u>  
 
<u>This week:</u>  
* PEPPo magnet/Solenoid installed on 80/20 (Completed)
+
* Area up to transition after solenoid under vacuum. RGA leak check completed.
* Alignment of big pieces (solenoid, viewer crosses, FC4) completed to ~100 micron tolerances per crew. Still awaiting report. (Completed)
+
* Downstream viewer / faraday cup assembly under vacuum. RGA leak check completed.
* Area up to transition after solenoid under vacuum; valve/bellow/bpm/spool installed. Pumping down and checking RGA now, but tentatively looks good.
+
* Last 4 5/8" bpm pulled from elevated line & installed. (One: failed insertion measurements & w/ John Musson, One: stripped tap hole).
* Install 4 5/8" BPMs after insertion measurements completed; 1 found bad - stealing another. Installing good one to d.s. cross today (4/19).
+
* New valve closed & middle diagnostic cross connected to upstream stuff on 2.75" flanges using bellows & available nipple with 4 5/8" flanges. NEG heated with 1A to drive out H2O. Pump cart is online & pumping @ 1500 Hz (i.e., good). Downstream spool piece + flange also installed. All but ~2 feet of beam line now under vacuum and leak checked.  
* Downstream viewer / FC cross assemblies nearly ready to leak check.
+
* Vacuum pumping down well, but light bake may be required once we have completed installation.
 +
* Trim cards being pulled by EES-DC for removed magnets on elevated line.
 +
* Roof tiles off for HDIce & Dilution refrigerator craned out (5/25). Roof tiles replaced again this morning (5/26).
 +
* Still more vacuum components dropped off to SRF for cleaning. Should probably order some 4 5/8" flanges...
 +
 
 +
<u>Still to do:</u>
 +
*40 L/s ion pump is attached to downstream side of valve on elevated line via a right angle valve & T. When pump cart is available, we need to get this ion pump ON. That puts elevated beam line in safe state, no accidents if valve were to OPEN (it's closed with controls disconnected).
 +
* Last spool piece [4.5" flange x 24.5" long x 4 5/8" flange] under fabrication. (Note: Pump cart w/ RGA suffering intermittent leak; Matt isolated to 11 L/s pump & 4-way cross joint - 4-way cross new, so swap out 11 L/s pump if it's an issue. One is staged on shelf in cave.) To install:
 +
*# Ion pumps OFF
 +
*# Purge with GN2 from both sides, one side through pump cart, the other side through kwik flange with 1/4" compression port.
 +
*# Use other pump cart from vacuum lab TL1137 (attached to the LIGO tube station) to vent from both sides, with GN2. Wait until Matt's return if desired.
 +
*# One more pump down and RGA leak check
 +
*# Add the thin window
 +
*# Heat / bake beam line
 +
*# Activate NEGs
 +
*# Switch Wastewater line vacuum ion pump HV from local supplies to house power / UHV supplies.
 +
*# Make UED updates as appropriate for vacuum system.
 +
* Install target mechanism
 +
* Add Mu metal over bellows on wastewater line.
  
 
*Gun work progressing well:
 
*Gun work progressing well:
*# [https://logbooks.jlab.org/entry/3876048 Sb evaporation source installed in deposition chamber]
+
*# HV chamber evaluation - plan to bake to evaporate lubricant & pump it off, install photocathode, and bake again.
*# [https://logbooks.jlab.org/entry/3876613 R28 insulator on cathode found punctured on removal] Lubricant from HV cable got into gun through insulator, path forward under assessment likely [https://logbooks.jlab.org/entry/3876887 related] to [https://logbooks.jlab.org/entry/3871018 gun HV] [https://logbooks.jlab.org/entry/3871040 trip on 3/25]
+
*# Sb source laser aperture added in depo chamber; aligned to laser path.
 +
*# Mask alignment examined.
 
*# [https://wiki.jlab.org/ciswiki/index.php/Spring_2021_-_Rebuilding_Photogun Gun rebuild schedule]
 
*# [https://wiki.jlab.org/ciswiki/index.php/Spring_2021_-_Rebuilding_Photogun Gun rebuild schedule]
 
*# Minor SF6 leak in HV chamber identified; repair later...
 
*# Minor SF6 leak in HV chamber identified; repair later...
Line 36: Line 55:
  
 
<u>Next Week:</u>
 
<u>Next Week:</u>
* Roof tiles off for HDIce (5/24), Dilution refrigerator craned out (5/25), and then roof tiles replaced again (5/26). SRF (Fisher) will be relocating material on roof to accommodate.
+
* Build 80/20 support structure; Pb table components awaiting delivery.
* Have spool pieces made and nipples welded
+
* Wrap up downstream vacuum work
* Mount bottle rack in Labyrinth; remove gas bottles to rack.
+
* EES may start cabling downstream section & making UED updates.
 
+
* Break vacuum in FC3 region
 +
* Ready to install Al base plates for FC3 region rework as well as solenoid stand. FC3 plate awaiting machining.
  
 
<u>2 weeks:</u>
 
<u>2 weeks:</u>
*Wastewater experiment line fully under vacuum (with flange in place of the thin window).
+
*Mount bottle rack in Labyrinth; remove gas bottles to rack.
*Install target mechanism
+
*Unistrut mounting for cables - Neal will do when available
*Build 80/20 support structure; add mounting plates/brackets/etc. (Pb table components awaiting delivery)
+
 
*Pull Heliax from Spectrum analyzer/Control room >> Buncher
 
*Pull Heliax from Spectrum analyzer/Control room >> Buncher
*Unistrut mounting for cables - Neal will do when available
 
 
*4th terminal system in Control room under assembly/rebuild
 
*4th terminal system in Control room under assembly/rebuild
 
*Break vacuum in FC3 region
 
*Ready to install Al base plates for FC3 region rework as well as solenoid stand. FC3 plate awaiting machining.
 
 
*[https://wiki.jlab.org/ciswiki/index.php/To-do_list Items from To-do list...]
 
*[https://wiki.jlab.org/ciswiki/index.php/To-do_list Items from To-do list...]
  
 
<u>Engineering</u>
 
<u>Engineering</u>
*Insertion measurements completed on 4 5/8" BPMs
 
*Leo dropped VCG off for installation today.
 
 
 
Other business
 
Other business
  

Latest revision as of 08:55, 26 May 2021

Meeting Information

Connecting

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/946721076.
  2. To join via Polycom room system go to the IP Address: 199.48.152.152 (bjn.vc) and enter the meeting ID: 946721076.
  3. To join via phone, use one of the following numbers and the Conference ID: 946721076.
    • Dial Either +1 408 740 7256 or +1 888 240 2560 for US or Canada

Agenda

Schedule

Long Term Schedule: Gantt (Outstanding tasks)

  1. Supplementary Shielding Installation: Mid-June
  2. Beamline Commissioning / Test Plans / Shielding Verification
  3. 7/26/21 Start Hot Check-out
  4. Commission new beam line and execute experiment
  5. Science!!!

New items for discussion:

Short term schedule update:
This week:

  • Area up to transition after solenoid under vacuum. RGA leak check completed.
  • Downstream viewer / faraday cup assembly under vacuum. RGA leak check completed.
  • Last 4 5/8" bpm pulled from elevated line & installed. (One: failed insertion measurements & w/ John Musson, One: stripped tap hole).
  • New valve closed & middle diagnostic cross connected to upstream stuff on 2.75" flanges using bellows & available nipple with 4 5/8" flanges. NEG heated with 1A to drive out H2O. Pump cart is online & pumping @ 1500 Hz (i.e., good). Downstream spool piece + flange also installed. All but ~2 feet of beam line now under vacuum and leak checked.
  • Vacuum pumping down well, but light bake may be required once we have completed installation.
  • Trim cards being pulled by EES-DC for removed magnets on elevated line.
  • Roof tiles off for HDIce & Dilution refrigerator craned out (5/25). Roof tiles replaced again this morning (5/26).
  • Still more vacuum components dropped off to SRF for cleaning. Should probably order some 4 5/8" flanges...

Still to do:

  • 40 L/s ion pump is attached to downstream side of valve on elevated line via a right angle valve & T. When pump cart is available, we need to get this ion pump ON. That puts elevated beam line in safe state, no accidents if valve were to OPEN (it's closed with controls disconnected).
  • Last spool piece [4.5" flange x 24.5" long x 4 5/8" flange] under fabrication. (Note: Pump cart w/ RGA suffering intermittent leak; Matt isolated to 11 L/s pump & 4-way cross joint - 4-way cross new, so swap out 11 L/s pump if it's an issue. One is staged on shelf in cave.) To install:
    1. Ion pumps OFF
    2. Purge with GN2 from both sides, one side through pump cart, the other side through kwik flange with 1/4" compression port.
    3. Use other pump cart from vacuum lab TL1137 (attached to the LIGO tube station) to vent from both sides, with GN2. Wait until Matt's return if desired.
    4. One more pump down and RGA leak check
    5. Add the thin window
    6. Heat / bake beam line
    7. Activate NEGs
    8. Switch Wastewater line vacuum ion pump HV from local supplies to house power / UHV supplies.
    9. Make UED updates as appropriate for vacuum system.
  • Install target mechanism
  • Add Mu metal over bellows on wastewater line.
  • Gun work progressing well:
    1. HV chamber evaluation - plan to bake to evaporate lubricant & pump it off, install photocathode, and bake again.
    2. Sb source laser aperture added in depo chamber; aligned to laser path.
    3. Mask alignment examined.
    4. Gun rebuild schedule
    5. Minor SF6 leak in HV chamber identified; repair later...


Next Week:

  • Build 80/20 support structure; Pb table components awaiting delivery.
  • Wrap up downstream vacuum work
  • EES may start cabling downstream section & making UED updates.
  • Break vacuum in FC3 region
  • Ready to install Al base plates for FC3 region rework as well as solenoid stand. FC3 plate awaiting machining.

2 weeks:

  • Mount bottle rack in Labyrinth; remove gas bottles to rack.
  • Unistrut mounting for cables - Neal will do when available
  • Pull Heliax from Spectrum analyzer/Control room >> Buncher
  • 4th terminal system in Control room under assembly/rebuild
  • Items from To-do list...

Engineering Other business

Reports on Open Action Items:

Action Items:

  • Formal run plan (McCaughan)

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