Difference between revisions of "Spring 2021 - Rebuilding Photogun"
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===Depo chamber : Replace schneedle, fix pucks, opportunistic jobs=== | ===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 (like print, but w/o plating) | ||
| + | :: fabricate one less galling SS | ||
* Galling reduced by addition of Mn and Si | * Galling reduced by addition of Mn and Si | ||
::* [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.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) | ||
Revision as of 09:40, 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 (like print, but w/o plating)
- fabricate one less galling SS
- 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