Difference between revisions of "Spring 2021 - Rebuilding Photogun"
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| Line 3: | Line 3: | ||
* Vent Depo Chamber | * Vent Depo Chamber | ||
: Pump out NF3, plan to leave leak valve as is | : Pump out NF3, plan to leave leak valve as is | ||
| − | : Vent Depo chamber | + | : Vent Depo chamber (isolation valve - bake line - pump) |
: Remove and mic pucks vs. series 30 series dwg, clean, fix [[media:JL0047248 PUCK BODY REV A.pdf]] [[media:MoPuckMount.docx]] | : Remove and mic pucks vs. series 30 series dwg, clean, fix [[media:JL0047248 PUCK BODY REV A.pdf]] [[media:MoPuckMount.docx]] | ||
| − | : Replace K source with Alvatec Sb source | + | : Add pucks => new bulk GaAs on X pucks + special one for HV conditioning? |
| + | : Replace K source with Alvatec Sb source => waiting on status from Mamun | ||
: Replace w/ Nitronic schneedle (make sure fit to pucks good first), set alignment into electrode w/o or w/ puck | : Replace w/ Nitronic schneedle (make sure fit to pucks good first), set alignment into electrode w/o or w/ puck | ||
:: Make (2) SS schneedle w/o silver plating, replace depo chamber silver plated schneedle [[media:ACC2003000-0219 schneedle.pdf]] | :: Make (2) SS schneedle w/o silver plating, replace depo chamber silver plated schneedle [[media:ACC2003000-0219 schneedle.pdf]] | ||
| Line 13: | Line 14: | ||
::* won't use this ... although probably not a problem, can be mildly magnetic [https://www.associatedsteel.com/stainless-steels/17-4-stainless-steel-pump-shaft-stainless-custom-450-stainless-tgp-mir50/ Mir50] (Mir50 trademark ASC Steel) | ::* won't use this ... although probably not a problem, can be mildly magnetic [https://www.associatedsteel.com/stainless-steels/17-4-stainless-steel-pump-shaft-stainless-custom-450-stainless-tgp-mir50/ Mir50] (Mir50 trademark ASC Steel) | ||
: Return 10" flange | : Return 10" flange | ||
| − | : Align mask to puck on heater, fix mask | + | : Align floppy mask to puck on heater, fix mask |
===HV chamber : Replace cathode electrode === | ===HV chamber : Replace cathode electrode === | ||
| Line 20: | Line 21: | ||
:*"new" niobium electrode here : https://wiki.jlab.org/ciswiki/index.php/CIS-ASY-R28-1 | :*"new" niobium electrode here : https://wiki.jlab.org/ciswiki/index.php/CIS-ASY-R28-1 | ||
:: LgGnNb leak check => done 4/8, Carlos leak tested complete assembly in 1137 | :: LgGnNb leak check => done 4/8, Carlos leak tested complete assembly in 1137 | ||
| − | :: LgGnNb fiducialize => | + | :: LgGnNb fiducialize => done, Chris will provide Carlos this info to compare assembly to assembly |
* Alignment Jobs in Cave | * Alignment Jobs in Cave | ||
: Walk job with Carlos & Chris => done 4/7 | : Walk job with Carlos & Chris => done 4/7 | ||
| Line 26: | Line 27: | ||
: Matt's "Have-Want" summary pics [[media:210414_HaveWant.pptx]] | : Matt's "Have-Want" summary pics [[media:210414_HaveWant.pptx]] | ||
: Decide if we want to run beam before venting => don't think so, agree at 4/15 UITF meeting | : Decide if we want to run beam before venting => don't think so, agree at 4/15 UITF meeting | ||
| − | * Vent HV Chamber to replace cathode | + | * Vent HV Chamber to replace cathode (isolation valve - bake pump - turbo) |
: Start depo jobs first to be ready for manipulator alignment | : Start depo jobs first to be ready for manipulator alignment | ||
: S&A will fiducialize upstream anode face in UITF | : S&A will fiducialize upstream anode face in UITF | ||
Revision as of 12:43, 14 April 2021
Depo chamber : Replace schneedle, fix pucks, opportunistic jobs
- Vent Depo Chamber
- Pump out NF3, plan to leave leak valve as is
- Vent Depo chamber (isolation valve - bake line - pump)
- Remove and mic pucks vs. series 30 series dwg, clean, fix media:JL0047248 PUCK BODY REV A.pdf media:MoPuckMount.docx
- Add pucks => new bulk GaAs on X pucks + special one for HV conditioning?
- Replace K source with Alvatec Sb source => waiting on status from Mamun
- Replace w/ Nitronic schneedle (make sure fit to pucks good first), set alignment into electrode w/o or w/ puck
- Make (2) SS schneedle w/o silver plating, replace depo chamber silver plated schneedle media:ACC2003000-0219 schneedle.pdf
- 4/6 - Shop is fabricating two, trying to have one ready by 4/18
- one from 316 or 316L SS and one from Nitronic 60 https://mis.jlab.org/mis/apps/job_request/mshop/view_request.cfm?request_id=330210&code=1
- Nitronic 60 data sheet (Nitronic trademark AK Steel)
- won't use this ... although probably not a problem, can be mildly magnetic Mir50 (Mir50 trademark ASC Steel)
- Return 10" flange
- Align floppy mask to puck on heater, fix mask
HV chamber : Replace cathode electrode
- Electrode Prep Work
- "old" existing electrode here : https://wiki.jlab.org/ciswiki/index.php/CIS-ASY-R28-3
- "new" niobium electrode here : https://wiki.jlab.org/ciswiki/index.php/CIS-ASY-R28-1
- LgGnNb leak check => done 4/8, Carlos leak tested complete assembly in 1137
- LgGnNb fiducialize => done, Chris will provide Carlos this info to compare assembly to assembly
- Alignment Jobs in Cave
- Walk job with Carlos & Chris => done 4/7
- S&A perform an as-found of the Gun through Y chamber => media:210414_UITF_15degLine_Summary.xlsx
- Matt's "Have-Want" summary pics media:210414_HaveWant.pptx
- Decide if we want to run beam before venting => don't think so, agree at 4/15 UITF meeting
- Vent HV Chamber to replace cathode (isolation valve - bake pump - turbo)
- Start depo jobs first to be ready for manipulator alignment
- S&A will fiducialize upstream anode face in UITF
- S&A will be able to help us align new schneedle where cathode will go
- S&A will be able to align cathode to anode
- S&A will be able to align cathode/anode combo on whatever line we want (thinking Y ports)
- CIS follows up for puck in/out tests, and laser alignment
Other jobs
- Improve stalk heater driver motion => done, https://logbooks.jlab.org/entry/3871902