= 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.
   * [https://ccap.hep.ph.ic.ac.uk/trac/wiki/Research/DesignStudy/Meetings/2019/12-20 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.