= LhARA radiobiology; meeting: 02Oct25; 14:00 BST =

**ZOOM:** https://imperial-ac-uk.zoom.us/j/98220889714?pwd=SM90vOF7BKSXoU3mD9q7OwBQo4IVB3.1 

**Present:** CD, EM, JP, DA, AFr, TP, TP(Jnr), RW, MH, JMcG, KL

== Agenda == 

1. Minutes and actions:
- **CD**: Upload Technical Summary
 - **Done**
- **MH**: Send Calvin the CAD of the cell carousel
 - **Done**
- **DA**: Investigate increasing Mylar window thickness
 - **Done**
- **JP**: Consumables plan
 - **Done**
- **CW**: Check service and testing of hoods
 - **Stands?**
- **JMcG/KL**: Remove old calendar invites
 - **Done**
- **KL/CD**: Update angular divergence in LLO
 - **Stands**

2. Strathclyde : BT, ED, RW \\
- Processing the RCF from Phase 1
 - All the RCF scanned on the relevant scanner now
 - Calvin, Nick and Robbie to meet to discuss
 - Robbie to send the RCF data to Tony as well - he can calculate the calibration curve
 - Once we understand the dose:
  - Organise Robbie, Emma and Jason to discuss irradiation plan
- Alter PMQ/target mounts
 - ~5cm closer after moving the mounts
- Add position referencing systems to PMQ drives
 - Robbie has built this in
- Install cell rotation mount
 - Fine alignment and checking rotation works correctly still to be done
- Further updates:
- TP now setup to switch on quite quickly. Can pump it down easily

3. Simulation CD, DA, AFr: \\
- Results of an Au foil in the beamline
 - Mean dose drops by a factor of 10 minimum
 - Diaza to sample transverse distribution at several points along the beamline
 - Source production to be improved
- Calvin to investigate defocussing the quads further

- Practicality of implementing a scattering foil
 - For Biology
  - Reduced mean dose only a problem if still aiming to do FLASH
 - Physically
  - SCAPA have an arm to use to place the foil in
  - The simplest position is in the vacuum tube (or maybe entry to tube)
   - Robbie to provide the viable positions of the foil in the beamline for simulations
  - Can obtain 10um Gold easily (Goodfellas)
  - Chris Spindloe to be the help if the transverse size needs to be reduced down


4. BioPrep EM, JP: \\
- Dry-run
 - Delayed due to hood availability
 - To be done at the beginning of the actual run. 
 - Should not cause a delay to the actual run if the dry run cannot be completed
- Dates for actual run
 - 27th Oct - 21st Nov
 - Emma on annual leave 24th to 31st Oct
 - Jason tied up on the week of 10th. Might be available on week of 3rd.
 - Dates can be pushed back if necessary 
- Plan for run
 - First week is obtaining proton focus again
 - Next two weeks is irradiation

5. Beam Diagnostics KL, CD: \\
- Show RCF holder idea
 - Could do with something to fix the holder to the cell carousel
 - Robbie and Calvin to sit down and discuss this
- Ken update on a sparse beam diagnostic
 - Jessel Patel is a good man to talk to at RAL about this
 - Ken going to chase Chris and try and find money too


6. DoNM 
- 16th October

7. AoB
- Tony's baby has officially joined LhARA!

=== Summary of actions ===
 - **CD/RW/ND**: Meet to discuss RCF calibration
 - **RW**: Send TP RCF data
 - **RW**: Fine tune installation of cell carousel
 - **DA**: Sample simulated beamline more frequently
 - **CD**: Investigate defocussing to improve uniformity
 - **CD/RW**: Design RCF holder
 - **KL**: Discuss sparse diagnostic at CLF




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