Difference between revisions of "2021-06-09"

Latest revision as of 17:07, 8 June 2021

Meeting Information

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Agenda

Schedule

Long Term Schedule: Gantt (Outstanding tasks)

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

New items for discussion:

Short term schedule update:
This week:

Elevated beam line terminated in pump and RGA leak checked
Experimental beam line under vacuum with thin window attached, RGA leak check required.
Vacuum pumping down well, but light bake may be required once we have completed installation.
STAC5 controller for chopper configured, installed, and tested.
FC3 region vented, purged, and mostly reconfigured.
Go ahead given by division management for FML to procure concrete shielding using funds from LDRD and UITF (10K+30kprocurement+30K AIP/Labor reapportionment)

Still to do:

Finish FC3 region vacuum work.
Install target mechanism
Add Mu metal over bellows on wastewater line.
EES may start cabling downstream section & making UED updates.

Gun work progressing well:
1. HV chamber evaluation - plan to bake to evaporate lubricant & pump it off, install photocathode, and bake again.
2. First bake went well, despite an unexpected power outage.
3. Test lab procedures updated to contact UITF and Polarized source group in event of power outages in the future.
4. Sb source laser aperture added in depo chamber; aligned to laser path.
5. Mask alignment examined
6. Pucks prepared for next run
7. Gun rebuild schedule
8. Minor SF6 leak in HV chamber identified; repair later...

Next Week:

Build 80/20 support structure; Pb table components awaiting delivery. (status update?)
Ready to install Al base plates for FC3 region rework as well as solenoid stand. FC3 plate awaiting machining.
Mount bottle rack in Labyrinth; remove gas bottles to rack.
Unistrut mounting for cables - Neal will do when available

2 weeks:

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)

Back to Main Meeting Minutes Page

@@ Line 22: / Line 22: @@
 <u>Short term schedule update:</u><br>
 <u>This week:</u>
-* Area up to transition after solenoid under vacuum. RGA leak check completed.
+* Elevated beam line terminated in pump and RGA leak checked
-* Downstream viewer / faraday cup assembly under vacuum. RGA leak check completed.
+* Experimental beam line under vacuum with thin window attached, RGA leak check required.
-* 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.
+* STAC5 controller for chopper configured, installed, and tested.
-* Roof tiles off for HDIce & Dilution refrigerator craned out (5/25). Roof tiles replaced again this morning (5/26).
+* FC3 region [https://logbooks.jlab.org/entry/3879455 vented, purged], and [https://logbooks.jlab.org/entry/3879558 mostly reconfigured].
-* Still more vacuum components dropped off to SRF for cleaning. Should probably order some 4 5/8" flanges...
+* Go ahead given by division management for FML to procure concrete shielding using funds from LDRD and UITF (10K+30kprocurement+30K AIP/Labor reapportionment)
 <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).
+* Finish FC3 region vacuum work.
-* 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.
+* EES may start cabling downstream section & making UED updates.
 *Gun work progressing well:
 *# HV chamber evaluation - plan to bake to evaporate lubricant & pump it off, install photocathode, and bake again.
-*# Sb source laser aperture added in depo chamber; aligned to laser path.
+*# First [https://logbooks.jlab.org/entry/3879424 bake] [https://logbooks.jlab.org/entry/3879430 went] [https://logbooks.jlab.org/entry/3879440 well], despite an unexpected power outage.
-*# Mask alignment examined.
+*# Test lab procedures updated to contact UITF and Polarized source group in event of power outages in the future.
+*# Sb source laser aperture added in depo chamber; [https://logbooks.jlab.org/entry/3878165 aligned to laser path].
+*# [https://logbooks.jlab.org/entry/3878166 Mask alignment examined]
+*# [https://logbooks.jlab.org/entry/3878908 Pucks prepared for next run]
 *# [https://wiki.jlab.org/ciswiki/index.php/Spring_2021_-_Rebuilding_Photogun Gun rebuild schedule]
 *# Minor SF6 leak in HV chamber identified; repair later...
@@ Line 55: / Line 47: @@
 <u>Next Week:</u>
-* Build 80/20 support structure; Pb table components awaiting delivery.
+* Build 80/20 support structure; Pb table components awaiting delivery. (status update?)
-* 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.
+* Mount bottle rack in Labyrinth; remove gas bottles to rack.
+* Unistrut mounting for cables - Neal will do when available
 <u>2 weeks:</u>
-*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