Difference between revisions of "Spring 2021 - Rebuilding Photogun"
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===Replace cathode electrode === | ===Replace cathode electrode === | ||
| − | * "old" existing electrode here : https://wiki.jlab.org/ciswiki/index.php/CIS-ASY-R28-3 | + | * 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 | ||
* leak test large grain Nb cathode/ceramic/flange assembly : << carlos' logbook entry goes here >> | * leak test large grain Nb cathode/ceramic/flange assembly : << carlos' logbook entry goes here >> | ||
| − | * fiducialize Nb cathode to 10" flange (old method glued fiducials) | + | * S&A jobs (will walk with Chris Gould 4/7 @ 9am UITF) |
| − | + | :: fiducialize Nb cathode to 10" flange (old method glued fiducials) | |
| + | :: (maybe) fiducialize existing 10" flange to HV chamber | ||
| + | :: fiducialize anode to HV chamber | ||
| + | :: align cathode to anode | ||
| + | :: align LM to cathode (after venting depo) | ||
| + | :: align HV to chamber Y | ||
| + | * re-align laser for retro-reflection | ||
* vent HV chamber, remove cathode electrode, searching for puck tab | * vent HV chamber, remove cathode electrode, searching for puck tab | ||
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===Replace depo schneedle === | ===Replace depo schneedle === | ||
Revision as of 10:37, 6 April 2021
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
- leak test large grain Nb cathode/ceramic/flange assembly : << carlos' logbook entry goes here >>
- S&A jobs (will walk with Chris Gould 4/7 @ 9am UITF)
- fiducialize Nb cathode to 10" flange (old method glued fiducials)
- (maybe) fiducialize existing 10" flange to HV chamber
- fiducialize anode to HV chamber
- align cathode to anode
- align LM to cathode (after venting depo)
- align HV to chamber Y
- re-align laser for retro-reflection
- vent HV chamber, remove cathode electrode, searching for puck tab
Replace depo schneedle
- Make (2) SS schneedle w/o silver plating, replace depo chamber silver plated schneedle media:ACC2003000-0219 schneedle.pdf
- Galling reduced by addition of Mn and Si
- Nitronic 60 data sheet (Nitronic trademark AK Steel)
- Mir50 (Mir50 trademark ASC Steel)
- NF3 leak value => leave as-is
- align mask, fix w/ two set screws
- replace K source with Alvatec Sb source?
Fix pucks
- 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