Difference between revisions of "Spring 2021 - Rebuilding Photogun"
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:: 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 => | ||
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* Alignment Jobs in Cave | * Alignment Jobs in Cave | ||
: Walk job with Carlos & Chris => done 4/7 | : Walk job with Carlos & Chris => done 4/7 | ||
Revision as of 05:37, 14 April 2021
HV chamber : Replace cathode electrode
- Electrodes
- "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 =>
- 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
- 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
Depo chamber : Replace schneedle, fix pucks, opportunistic jobs
- 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)
- 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
- Vent Depo Chamber
- Pump out NF3, plan to leave leak valve as is
- Vent Depo chamber
- 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
- Replace w/ Nitronic schneedle (make sure fit to pucks good first), set alignment into electrode w/o or w/ puck
- Return 10" flange
- Align mask to puck on heater, fix mask
Other jobs
- Improve stalk heater driver motion => done, https://logbooks.jlab.org/entry/3871902