Spring 2021 - Rebuilding Photogun

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Replace cathode electrode

  • "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 >>
  • fiducialize Nb cathode to 10" flange (old method glued fiducials)
  • (maybe) fiducialize existing 10" flange to HV chamber
  • vent HV chamber, remove cathode electrode, searching for puck tab
  • fiducialize anode to HV chamber
  • align cathode to anode
  • align LM to cathode (after venting depo)
  • align HV to chamber Y and re-align laser for retro-reflection

Replace depo schneedle

  • NF3 leak value => leave as-is
  • align mask, fix w/ two set screws
  • replace K source with Alvatec Sb source?

Fix pucks

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