Proton Calorimetry/Meetings/2018/01/24

Minutes for UCL Proton Calorimetry Meeting, 24th January 2018 (D17, Physics & Astronomy, UCL)

Present

Simon Jolly, Laurent Kelleter, Matthieu Hentz, Anastasia Basharina-Freshville, Jordan Silverman, Dan Walker

LK:

• Investigating image acquisition for Nikon camera:
  • Using SJ liquid scintillator image to test reconstruction.
  • Integrating single column of pixels to get 1D curve.
  • Gets an approximate Bragg curve from integrated signal but reflections in image make curve poor.
• To Do:
  • Computer upgraded to Centos7: fit doesn't work any more (ROOT integrator fails).
  • Find a way to deal with very different scintillator slice thicknesses
  • Data format of ISDI sensor?
  • Make everything more smooth and ready-to-use for users
  • Make sure camera hardware is set up ready for DAQ.

JS:

• Making measurements of scintillator sheet thickness:
  • 3 mm sheets are closer to 2.75 mm but variation is mostly below 100 microns.
  • 2 mm sheets have 2 groupings:
  • 2.0 mm group has better flatness than 2.6 mm group.
• Also been playing around with Clatterbridge simulations:
  • Tried running on Centos7.
  • Will go back to SL6 as it actually works properly...
• To Do:
  • Split up 2 mm sheet results into the 2 groups.
  • Meeting with Matthieu on Clatterbridge simulations.
  • Get them running on SL6.

DW:

• Investigating negative integrated waveforms form LeCroy binary files:
  • One bad pulse comes from small tail in leading pulse region.
  • Reducing standard deviation for this region cuts out bad pulse.
• Put up instructions on LeCroy binary file conversion for Tony Price on PBTWiki.
• To Do:
  • Adding integration window to get spectrum to match Caen ADC data.
  • Badger Tony Price for tracker files.

ABF:

• Writing paper: finish off plots and majority of writing.
• Painting scintillator sheets:
  • Both paints look good so far.
  • Will check on Monday for painting all sheets.
• Final version of 3 month plan requested by SJ:
  • Will include notes from previous meetings and circulate.
  • Will not include any details of final plans for beam tests: waiting for discussion with Ruben Saakyan.
  • SJ strongly objected to choice not to decide on complete schedule in advance, but left choice to ABF.
  • SJ requested to be involved in meeting with RS regarding final beam schedule.
• To Do:
  • Complete main draft of schedule (but NOT including requirements for beam tests).
  • Painting scintillator.
  • First draft by next week.

MH:

• Finished all first term exams and coursework.
• Second term courses starting to bear fruit! But needs to learn background mathematics...
• Will attend proton imaging workshop in Lyon, 14–15 June.
• Currently compiling Geant4 on Virtual Machine on new MacBook.
• To Do:
  • Meeting with Jordan on Wednesday.
  • Buffering of readout in Geant4.