Difference between revisions of "Spring 2021 - Rebuilding Photogun"

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===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
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* vent HV chamber, remove cathode electrode, searching for puck tab
 
* vent HV chamber, remove cathode electrode, searching for puck tab
  
===Replace depo schneedle ===
+
===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
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* 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?
 
===Fix pucks===
 
 
* 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 10:38, 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

Other jobs