Proton Calorimetry/Meetings/2018/02/07

Minutes for UCL Proton Calorimetry Meeting, 7th February 2018 (D17, Physics & Astronomy, UCL)

Present

Simon Jolly, Ruben Saakyan, Matthieu Hentz, Jordan Silverman, Anastasia Basharina-Freshville, Laurent Kelleter

SJ:

• Meeting with LK at TU Wien HEPHY on 1st February:
  • TU Wien have 26x26mm sensor developed for Belle they want to use for proton CT.
  • Sensor is very early in pCT development: readout is slow (~1,000 frames/s).
  • Potential for pCT collaboration.
  • They are sharing experimental time with us at MedAustron on 22/23 March.
  • We will have 6 hours on Thursday night and ~4 hours on Friday night.
  • Will make single module measurements for them: MedAustron rate and pCT calorimetry.
  • Accommodation is booked: 4 rooms in Orange Wings (close to MedAustron).
• Both Zarges enclosures are finally here:
  • Smaller one is painted: waiting on specs from ISDI to choose patch panel connectors.
  • Larger one just arrived: Derek will paint tomorrow.

LK:

• Running tests on Scintillator Sheets using LED:
  • First tests with Nikon DSLR carried out on 5/6 February.
  • Some sheets not properly painted, so light leaks in around fibre.
  • Camera highly adjustable: RS suggests running tests with LED settings used for PRIAPUS saturation.
  • Lens aberrations seen with high light levels.
  • Variation seen across sheet but average light level approximately the same for all sheets.
• To Do:
  • Some sheets need repainting: will speak to Derek Attree.
  • Chasing up ISDI!
  • Test USB3 patch panel connector.
  • Finish off analysis.
  • Add Remote Desktop information to Wiki.

ABF:

• To Do:
  • Continue LED tests: rerun with settings that saturated PRIAPUS; set up radioactive source.
  • Label scintillator sheets.
  • Polish scintillator sheets.
  • Analyse LED data.

RS:

• Had meeting with Hamamatsu.
• 2 potential products available:
  • Linear image sensor.
  • Position sensitive linear image sensor.
• Both active pixel sensor strips.
• Industrial devices: less than £50 each!
• Readout available but expensive (£800).

MH:

• Focussing on buffered event writing in Geant4 to speed up simulations.
• Fixed issue by avoiding use of pointers: needed a custom accumulator class.
• Factor of 30 speed up with buffering!
• Code needs tidying up..
• To Do:
  • Tidy up Geant4 buffering code.
  • Update Wiki.

JS:

• Reanalysed scintillator sheet thicknesses after painting:
  • Difference in thickness of 10 to 70 microns after painting.
• To Do:
  • Write up scintillator sheet measurements on Wiki page.
  • CAD import/export in Geant4.