Difference between revisions of "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 | |
| − | + | * leak test large grain Nb cathode/ceramic/flange assembly : << carlos' logbook entry goes here >> | |
| − | * leak test large grain Nb cathode/ceramic/flange assembly | + | * S&A jobs (will walk with Chris Gould 4/7 @ 9am UITF) |
| − | * fiducialize Nb cathode to 10" flange (old method glued fiducials) | + | :*fiducialize Nb cathode to 10" flange (old method glued fiducials) |
| − | * (maybe) fiducialize existing 10" flange to HV chamber | + | :*(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 | ||
| − | |||
| − | |||
| − | |||
| − | |||
| − | ===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]] | ||
| + | :*fabricate one from 304 SS and one from Nitronic 60 https://mis.jlab.org/mis/apps/job_request/mshop/view_request.cfm?request_id=330210&code=1 | ||
| + | ::* [https://www.hpalloy.com/Alloys/descriptions/NITRONIC60.aspx?kw=%2Bnitronic%20%2B60&cpn=48402520&utm_term=%2Bnitronic%20%2B60&utm_campaign=NITRONIC&utm_source=adwords&utm_medium=ppc&hsa_net=adwords&hsa_tgt=kwd-41394160017&hsa_ad=393453120372&hsa_acc=6124394374&hsa_grp=1610180530&hsa_mt=b&hsa_cam=48402520&hsa_kw=%2Bnitronic%20%2B60&hsa_ver=3&hsa_src=g&gclid=EAIaIQobChMIzJv0vOnp7wIVypyzCh0bPAmCEAAYASAAEgLYn_D_BwE Nitronic 60 data sheet] (Nitronic trademark AK Steel) | ||
| + | ::* [https://www.associatedsteel.com/stainless-steels/17-4-stainless-steel-pump-shaft-stainless-custom-450-stainless-tgp-mir50/ Mir50] (Mir50 trademark ASC Steel) | ||
* NF3 leak value => leave as-is | * NF3 leak value => leave as-is | ||
* 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]] | ||
| − | === | + | ===Other jobs=== |
| + | * Re-align HV chamber before venting? => sent request to Gould | ||
| + | * (done) Repair stalk heater driver => https://logbooks.jlab.org/entry/3871902 | ||
Revision as of 16:06, 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
- fabricate one from 304 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)
- 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