Mar 17, 2022 - Update Meeting

Agenda

• NEG screens - Marcy
• Vacuum chamber
  • Phil - Anything else to be done to the chamber (fiducial fixtures? support base? etc.)
  • How is the vacuum bake going? Marcy / Phil
• Gun table layouts (UITF, CEBAF) - Shaun
• Anode tube versions
  • Shaun sent Gabriel models for the 12 narrow and for the 6 wide slot tubes
  • Gabriel has done simulation of the beam deflection with these 2 models. Slides can be found here
  • The 12 slot tube seems to have a lesser effect on beam kick compared to the 6 slot tube
  • Gabriel and Carlos will discuss next week with Joe results from electrostatic models with various biasing options. This is to pick the best tube version (12 narrow slots, or 6 wide slots)
• These are the models for the anode drift tube with 12, 0.5 inch wide slots (blue) and another tube with 6, 1.0 inch wide slots.
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• The electrodes and anode have been vacuum degassed to 950 C for 6 hours by S. Williams with the resulting sun profile shown below.
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• The electrode have been store din containers ready for UHV cleaning in the production chem room just prior to assembly.
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• The ball electrode after the vacuum degassing run profile shown above (950 C for h)
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