LhARA pre-CDR Meeting 12th Nov 2019

Meeting details

14:00 Room 532, Blackett Lab.

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Agenda

• Schedule and key dates.
• LhARA_parameter_list.pdf
• 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.

Notes

Present: Ajit Kurup, Ken Long, Jason Parsons, Tim Greenshaw, Juergen Pozimski, Galen, Aymar, Ruth McLauchlan, Colin Whyte, Peter Ratoff, Will Shields

• Schedule

○ JPo: Need to clarify the interfaces as there is overlap in the components, e.g. Gabor lens in the capture and beam line. ○ CW: Need to discuss target location with respect to the first Gabor lens. ○ JPo: Spoke with Zulfikar re debris, differential pumping, etc. Will set up another meeting including CW.

• Floor plan layout

○ AK: Has someone been assigned to do the CAD drawings and do we have access to the previous drawings.

○ GA: Someone will be assigned soon to do the CAD drawings and the previous drawings are in RAL's database.

○ KL: best not to update the drawing for the end of November as details won't be fixed.

○ JPo: better to make a list of changes.

○ AK: Want to raise the issue of animal holding facilities and whether an on-site facility is needed (which would require a separate floor). ○ JPar: Need some on-site facilities, e.g. holding facilities, but should consider how much space is needed. ○ Following some discussion, it was decided that an animal house should not be included in the plans for LhARA but a holding facility will be needed. The size of this is to be determined taking into account the scope of the proposed radiobiology programme. ○ AK to ask ZN and OE to specify total footprint of the laser and shielding requirements.

• Parameter table

○ JPo: Parameters in the table will define the physical geometry of the Gabor lens and the nominal operating voltage. This is sufficient info to generate a field map (for tracking).

§ KL: What about alternative technologies, i.e. solenoids. § Following some discussion, it was decided that the equivalent solenoid field strength and lengths of the solenoids should be included in the parameter table.

○ Beam transport

§ Details in the parameter table should define the input and output beam. § AK to discuss with JPas.

○ Stage 2 needs to include another end station (also define the input and output beams). ○ End stations - JPar.

§ 30mm beam size would be better than 10mm.

□ AK: to follow up with JPas.

§ Platform and robot for multiple irradiations. § Clatterbridge experiments can go through 130 dishes at a time.

• Status updates

○ Proton capture - JPo

§ COMSOL needed for the EM simulation of the Gabor lens. § Would be good to also do the plasma simulation in COMSOL. § AK got a quote from COMSOL. Looking into options for reducing the cost.

○ Beam transport - WS

§ GPT studies to verify tracking with and without space charge.

• Instrumentation

○ PPD will provide input to this. ○ For the baseline, include a statement of the need for diagnostics and how they will be used, e.g. during commissioning and running.

• AOB

○ KL: Steering group set up. Will have SG meetings.

§ Add SG meetings to the wiki.

Action Items

• JPo, CW, ZN and OE to meet to discuss details at the laser/proton capture interface.
• AK to update the interfaces documents to clarify areas where there are overlaps in the components.
• AK to clarify on the wiki what needs to be delivered for 29/11/19.
• AK to ask ZN and OE to specify total footprint of the laser and shielding requirements.
• AK to add solenoid details (from the GPT input file) to the parameter list document.
• AK to discuss with JPas what parameters should go in the parameter table for the beam transport.
• AK to note the instrumentation requirements for the definition of the baseline.
• AK to add details of the steering group meetings to the wiki.