Spring 2021 - Rebuilding Photogun
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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
- S&A 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
- 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
- NF3 leak value => leave as-is
- align mask, fix w/ two set screws
- replace K source with Alvatec Sb source?
- Inspect and mic pucks against series 30 series dwg media:JL0047248 PUCK BODY REV A.pdf media:MoPuckMount.docx
Other jobs
- Re-align HV chamber before venting? => sent request to Gould
- (done) Repair stalk heater driver => https://logbooks.jlab.org/entry/3871902