Difference between revisions of "Spring 2021 - Rebuilding Photogun"
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| Line 1: | Line 1: | ||
| − | ===Replace cathode electrode === | + | ===HV chamber : Replace cathode electrode === |
* Electrodes | * Electrodes | ||
::"old" existing electrode here : https://wiki.jlab.org/ciswiki/index.php/CIS-ASY-R28-3 | ::"old" existing electrode here : https://wiki.jlab.org/ciswiki/index.php/CIS-ASY-R28-3 | ||
| Line 14: | Line 14: | ||
* vent HV chamber, remove cathode electrode, searching for puck tab | * vent HV chamber, remove cathode electrode, searching for puck tab | ||
| − | ===Replace | + | ===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]] | * 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 | * Galling reduced by addition of Mn and Si | ||
| Line 22: | Line 22: | ||
* align mask, fix w/ two set screws | * align mask, fix w/ two set screws | ||
* replace K source with Alvatec Sb source? | * 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]] | * Inspect and mic pucks against series 30 series dwg [[media:JL0047248 PUCK BODY REV A.pdf]] [[media:MoPuckMount.docx]] | ||
Revision as of 09:38, 6 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
- 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
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
- 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?
- 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