LhARA Weekly Meeting 21^st July 2020; 14:00 BST

Summary of actions

• KL: Create draft response to referees.
• KL: Create ICHEP talk rehearsal slot for week of 27Jul20

Present: JPar, KL, AK, TSD, AP, AG, HTL, TG, WS, PA, CW, OE, JPa, RB, JM

Notes

1. Notes of previous meetings and actions:
   • KL: Create draft response to referees.
     • Stands.
   • KL/WS: to exchange emails with AK re "restart" of experiment and simulation meetings.
     • Done. Will do same as before, ~30 mins, will do it on Tuesday PM. Do it just before LhARA meeting. Use same ZOOM booking.
   • KL: Organise LhARA logo competition.
     • Done.

2. Status of pre-CDR publication: KL/All
   Referees' comments have been received: see the top of the pre-CDR publication wiki page.
   Skeleton of response document.
   We reviewed the referees comments and discussed our responses. We agreed that a draft response and revised paper would be circulated this Friday.

3. Preparation of response to referees: KL, ALL
   • Next week.

4. Updates:
   • Capture section: CW
     • Working towards ERC proposal. In particular, trying to get a consistent project plan. TSD and HTL continue to make good progress and will provide updates below.
   • Simulation:
     • Particle production at laser target: HTL
       • HTL is checking the convergence, now focusing on the dependence of the spectrum on the cell size. He has initial particle distributions which he is now starting to analyse. A long, high-resolution run is "in the computer" and will be analysed when it is complete (Thursday).
       • TG: notes that he has seen a ​paper in which two beams at 90^o to each other, each at 45^o to the foil are used to increase particle production. RB commented that there are studies TNSA can be enhanced by sending a second pulse and exploiting its ponderomotive force to enhance production. OE notes that such schemes could be used for LhARA, but had specified simplest.
     • Gabor lens simulation: TSD
       • TSD has looked into simulation for first simulation of the lens. Dynamics of electrons in lens is being considered. At the present he has not been able to create a discharge and is investigating why a discharge is not initiated. The execution speed is also being investigated. Also worrying about speed. At the last meeting a discussion was initiated about the relative priorities of the various simulations in the light of the ERC proposal deadline.
   • Any other simulation
     • No further update. OPAL installation underway on IC cluster underway. Some issues being addressed with S.Fayer.

5. Status of preparation of Expression of Interest for the ​EPSRC Transformative Healthcare Technologies call: KL, ALL
   We discussed the possible scope of the proposal. We identified the need to address the principle risks in the initial R&D programme. Therefore the following threads needed to be included in the proposal:
   • Laser-driven source, Gabor lens, and their integration;
   • Instrumentation, diagnostics, and dosimetry;
     • We identified three sub-themes:
       • Beam: distructive and non-distructive;
       • Biological end-station: e.g. "proto"-acoustic imaging, ...
       • Near clinical: dosimetry, position-dependent dosimetry, micro-dosimetry ...
   • Conceptual/technical design of stage 1 and stage 2
   • Active participation in radiobiological investigation
   Need for:
   • New "institute collage" for talks and publicity: TSD
     Updated institute slide released after the meeting. All are asked to comment.
   • LhARA logo competition:
     Temporary page on wiki to collate entries has been made. KL is keeping the mapping of "entry Id" to designer.

6. Conference contributions: All
   • ICHEP -- Parallel session contributing; see ​http://ichep2020.org
     • Draft slides
       We agreed that all would send comments on the slides and that KL would book a rehearsal slot for next week.

7. AOB
   • None.

Agenda

1. Notes of previous meetings and actions:
   • KL: Create draft response to referees.
   • KL/WS: to exchange emails with AK re "restart" of experiment and simulation meetings.
   • KL: Organise LhARA logo competition.

2. Status of pre-CDR publication: KL/All
   Referees' comments have been received: see the top of the pre-CDR publication wiki page.
   Skeleton of response document.

3. Preparation of response to referees: KL, ALL

4. Updates:
   • Capture section: CW
   • Simulation:
     • Particle production at laser target: HTL
     • Gabor lens simulation: TSD
   • Any other simulation

5. Status of preparation of Expression of Interest for the ​EPSRC Transformative Healthcare Technologies call: KL, ALL
   Need for:
   • New "institute collage" for talks and publicity: TSD
   • Logo(!); competition -- update

6. Conference contributions: All
   • ICHEP -- Parallel session contributon; see ​http://ichep2020.org
     • Draft slides

7. AOB

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