Design and Integration meeting: 15 August 2023 15:00 GMT

Zoom: ​https://ukri.zoom.us/j/99571436156

Agenda

• Actions from last meeting.
• Simulations.
• Engineering.
• AOB

Actions

23-01-24-01

All to prepare document for the milestone to update the baseline

In progress

Notes

Present: Neil Bliss, Clive Hill, Mark Johnson, Ajit Kurup, Keith Middleman, Jaroslaw Pasternak, Lilli Platt, Rehanah Razak, Will Shields, Colin Whyte
Apologies: Ken Long, Hywel Owen

• Keith Middleman senior vacuum design engineer
  • Looking at the gas flow through the target vessel interface with the first gabor lens.
  • Using MOLFLOW+ (free software for accelerator vacuum modelling ).
  • Looked at gas desorption from the target in a diffuse scenario and for different narrower angular spreads.
  • CW: Would be good to do an experiment.
  • From the simulations it looks like the vacuum should be OK but depends on how strong the beaming affect is.
  • Need to also consider gas desorption from the other surfaces of the target vessel.
  • KM will prepare a paragraph and the tables for the design review.
• Engineering update - NB
  • Meeting tomorrow in Strathclyde to discuss target configurations.
  • Further FEA work on the FETS vacuum chamber.
    • Looking at trying 8mm wall thickness instead of 10mm by including radii in the corners to reduce stress.
  • Power consumption
  • Schematic update.
    • Need reference design for profile monitor and the cavity to determine if the gap between lenses 2 and 3 is realistic.
      • JP to provide cavity dimensions.
      • AK to ask FETS for details of profile monitor.
      • WS will ask IBA for details of their profile monitors.
    • WP5 are charged with beam instrumentation.
    • Discussion on position of the collimators.
      • One after Gabor lens 3
      • One just before the vertical bend
      • One half way along the vertical arc.
  • Slide from CH on the schematic.
    • Adjustment of the positions of the Gabor lenses.
    • Length between lenses 3 and 4 is critical.
• Simulations
  • Slides on end station dose from WS
    • File that was found does not have the correct input beam so it looks like the data used in the pre-CDR was lost.
    • New BDSIM model
      • Uses slightly different physics list.
    • 12.2 Gy/shot instead of 12.8 Gy/shot quoted in the pre-CDR.
  • Slides from LP on octupole and collimator optimisation.
  • Details from JP on FFA design.
    • Found working point for high-intensity operation by using a small D (instead of a small F doublet)