GTS meeting 9 13 16

• Prep Chamber
  • Update from Mamun
• Gun HV chamber
  • While we want to minimize amount of NEG particulates, we also need significant Hydrogen pumping speed during high voltage conditioning.
  • We will then install 6 WP modules, not 8 like the UITF gun, and will use a perforated plate rather than the wire mesh used in the UITF gun. The perforated plate will reduce pumping speed, but should also reduced the field reaching the WPs compared to the wire mesh. Yan has done some POISSON modeling that shows field is reduced by at least a factor of two with the wire mesh.
  • We will do a pre-bake and NEG WP's full activation without the electron win TL1137, since SAES reports that particulate productions is considerable reduced after the first two activations, see: [1]
• Magnet Installation and test
  • Update from Riad

• Pictures of multi-alkali photocathode removed from the prep chamber after being used to deliver 1 mA, 300keV beam.
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