Must, Should and Likes
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Must
- Achieve and sustain ~1E-12 Torr vacuum conditions
- Operate reliably at 200 kV without field emission
- Be tested with 200 keV beam in UITF
Should
- Compensate the beam kick induced by the gun geometry (insulator-cathode assembly perpendicular to anode-cathode gap) and construction (NEG modules placed on bottom half of the vacuum chamber)
- Improve vacuum conditions in the anode drift tube
Like
- Replace old NEG WP-1250 cartridges with modern SAES UHV 14000 wafer modules [1]