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 >>
  • 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