LhARA pre-CDR Meeting 7th Jan 2020

Meeting details

14:00 Room 532, Blackett Lab.

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  • Action items from last meeting.
    • JPar to look into spot scanning beam specs for in vivo experiments.
  • System updates.
    • Laser driven proton and ion source.
    • Proton and ion capture.
    • Stage 1 beam transport: Beam transport and delivery to the in vitro end station.
    • Stage 2 beam transport: Post-acceleration and beam delivery to the in vivo end station.
    • Biological end stations.
    • Infrastructure and Integration.
    • Project plan for the delivery of LhARA.
    • Safety.
    • End-to-end simulation.
    • Instrumentation.
  • A.O.B.


Participants: KL, WS, AK, HTL, JPoz, CW, JPas
Apologies: JT, GA

  • Action items
    • JPar to look at spot scanning.
      • Trying to arrange a date to meet Karen. Could be Feb.
      • Spot scanning may not be necessary, can do many things with passive scattered.
      • KL: Energy too low to passively scatter.
      • KL: For microbeams:
        • Ideally like to get back to laser target spot size. ~70 micron.
        • Other people do few hundred microns width beams.
      • Discussion re fixing spot size for spot scanning.
        • Choose 100 micron spot size for scanning.
  • System updates
    • Capture.
      • Summary of discussion on 20th Dec.
      • Calculations from Colin on differential pumping.
        • Prelim calculations show can have 2 orders of magnitude pressure differential.
        • Need to include investigating this experimentally into the R&D plan.
      • CW spoke to Bob Bingham who is interested in the lens.
    • Beam transport
      • BDSIM model updated to include all features. Most of Stage 2 parts are there only as placeholders, waiting for physics design to be finalised.
      • Looked at countering space charge by neutralising more at the start to improve transmission.
      • Include phase rotation/bunch compression RF cavities.
        • JPas: I can provide bunch length at extraction and energy spread.
        • JPoz: I can then work out voltages and drifts.
    • End stations
      • Going over floor plan.
        • Second end station will be incorporated.
        • WS to send JPar snapshot of beamline.
        • Meeting with Birmingham re FLASH irradiations. They will set up a FLASH R&D facility and hope to start irradiations end of Jan to early Feb.
        • AK: Have they done anything on dosimetry.
          • Not yet.
        • KL: Tim Greenshaw is giving a seminar in Birmingham.
  • AOB
    • Schedule and costing from KL.
      • KL to circulate the project and request WPMs to update their parts.
    • JPas: deadline for APAC on 9th.
    • IOP HEPP and PAB meetings, need to submit abstract by 24th Jan.

Action items

  • WS to send JPar snapshot of beamline.
Last modified 4 years ago Last modified on Jan 13, 2020 9:43:54 PM

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