Difference between revisions of "Spring 2021 - Rebuilding Photogun"

From Ciswikidb
Jump to: navigation, search
Line 16: Line 16:
 
===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 10:40, 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

fabricate one from 304 (like print, but w/o plating)
fabricate one less galling SS
  • Galling reduced by addition of Mn and Si

Other jobs