Difference between revisions of "2021-05-26"

Revision as of 08:52, 20 May 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:

Area up to transition after solenoid under vacuum. Ready for RGA leak check.
Downstream viewer / faraday cup assembly under vacuum. Ready for RGA leak check.
Second 4 5/8" BPM stolen from elevated line for installation.
Roof tiles off for HDIce (5/24), Dilution refrigerator craned out (5/25), and then roof tiles replaced again (5/26).
Spool pieces / nipples being fabricated

Gun work progressing well:
1. HV chamber evaluation - plan to bake to evaporate lubricant & pump it off, install photocathode, and bake again.
2. Gun rebuild schedule
3. Minor SF6 leak in HV chamber identified; repair later...

Next Week:

Mount bottle rack in Labyrinth; remove gas bottles to rack.
Wastewater experiment line fully under vacuum (with flange in place of the thin window).
Install target mechanism
Build 80/20 support structure; Pb table components awaiting delivery.
Unistrut mounting for cables - Neal will do when available
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:

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>
-* PEPPo magnet/Solenoid installed on 80/20 (Completed)
+* Area up to transition after solenoid under vacuum. Ready for RGA leak check.
-* 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. Ready for RGA leak check.
-* Area up to transition after solenoid under vacuum; valve/bellow/bpm/spool installed. Pumping down and checking RGA now, but tentatively looks good.
+* Second 4 5/8" BPM stolen from elevated line for installation.
-* Install 4 5/8" BPMs after insertion measurements completed; 1 found bad - stealing another. Installing good one to d.s. cross today (4/19).
+* Roof tiles off for HDIce (5/24), Dilution refrigerator craned out (5/25), and then roof tiles replaced again (5/26).
-* Downstream viewer / FC cross assemblies nearly ready to leak check.
+* Spool pieces / nipples being fabricated
 *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]
 *# [https://wiki.jlab.org/ciswiki/index.php/Spring_2021_-_Rebuilding_Photogun Gun rebuild schedule]
 *# Minor SF6 leak in HV chamber identified; repair later...
@@ Line 36: / Line 35: @@
 <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.
-* Have spool pieces made and nipples welded
 * Mount bottle rack in Labyrinth; remove gas bottles to rack.
+* Wastewater experiment line fully under vacuum (with flange in place of the thin window).
+* Install target mechanism
+* Build 80/20 support structure; Pb table components awaiting delivery.
+* Unistrut mounting for cables - Neal will do when available
+* 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>
-*Wastewater experiment line fully under vacuum (with flange in place of the thin window).
-*Install target mechanism
-*Build 80/20 support structure; add mounting plates/brackets/etc. (Pb table components awaiting delivery)
 *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
-*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...]
 <u>Engineering</u>
-*Insertion measurements completed on 4 5/8" BPMs
-*Leo dropped VCG off for installation today.
 Other business