wiki:Research/LhARA/DesignAndIntegration/Meetings/2023/2023-08-15

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)

Last modified 6 months ago Last modified on Aug 22, 2023 9:36:16 PM

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