LhARA pre-CDR Meeting 7th Jan 2020

Meeting details

14:00 Room 532, Blackett Lab.

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Agenda

• 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.
    • Summary of discussion on laser-capture interface
  • 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.

Notes

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.