Proton Calorimetry/Meetings/2018/02/07: Difference between revisions

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'''SJ''':
'''SJ''':
* Making progress with [http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2018/DW_LeCroyData_31-01-18.pptx extracting data from Leroy binary files]:
* Meeting with '''LK''' at TU Wien HEPHY on 1st February:
** Aim is to load LeCroy waveform files, identify pile-up, calculate ADC counts and do it quickly.
** TU Wien have 26x26mm sensor developed for Belle they want to use for proton CT.
** Previously used &chi;<sup>2</sup> for selecting bad pulses; Schmitt trigger on rising edge faster.
** Sensor is very early in pCT development: readout is slow (~1,000 frames/s).
** Integrating whole pulse gives broader peak with larger mean than Caen.
** Potential for pCT collaboration.
** Shortening integration window makes LeCroy peak match with Caen, even for low counts.
** 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 [http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2018/LK20180207_ScintillatorSheetTestsWithLED.pdf 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'':
* ''To Do'':
** Update information on Wiki.
** Some sheets need repainting: will speak to '''Derek Attree'''.
** Badger '''Tony Price''' for tracker files!!.
** Chasing up ISDI!
** Work out how to calculate incoming trigger rate for LeCroy scope.
** Test USB3 patch panel connector.
** Finish off analysis.
** Add Remote Desktop information to Wiki.


'''JS''':
'''ABF''':
* Reanalysed scintillator sheet thicknesses:
** 3&nbsp;mm sheets are closer to 2.75&nbsp;mm but variation is mostly below 100 microns.
** 2&nbsp;mm sheets have 2 groupings:
** 2.0&nbsp;mm group has better flatness than 2.6&nbsp;mm group.
** Thickness sigma of 3&nbsp;mm sheets 90% below 30 micron target.
* Continuing to work on Clatterbridge simulations:
** Needs a list of things to do!
* ''To Do'':
* ''To Do'':
** Write up scintillator sheet measurements and post iPython notebook with analysis.
** Continue LED tests: rerun with settings that saturated PRIAPUS; set up radioactive source.
** '''MH''' will but '''JS''' in touch with '''Jactina Yap''' to include more components in beamline.
** 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''':
'''MH''':
* Update from '''Jacinta Yap''' on Clatterbridge:
* Focussing on buffered event writing in Geant4 to speed up simulations.
** Spoken to Andrzej Kacperek about positions of cap and nozzle: positions and locations shouldn't make difference to treatment.
* Fixed issue by avoiding use of pointers: needed a custom accumulator class.
** Dose monitor foils are 20 microns with air gap in between of 2&nbsp;mm.
* Factor of 30 speed up with buffering!
** '''Jacinta''' needs to know input parameters, particularly energy and energy spread.
* Code needs tidying up..
* Trying to replicate bug in buffered readout for Geant4.
* ''To Do'':
* Currently compiling Geant4 on Virtual Machine on '''new''' MacBook.
** Tidy up Geant4 buffering code.
** Update Wiki.
 
'''JS''':
* [http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2018/JS_07_02_18.pptx Reanalysed scintillator sheet thicknesses after painting]:
** Difference in thickness of 10 to 70 microns after painting.
* ''To Do'':
* ''To Do'':
** Buffering of readout in Geant4.
** Write up scintillator sheet measurements on Wiki page.
** Put '''JS''' in touch with '''Jacinta Yap'''.
** CAD import/export in Geant4.

Latest revision as of 14:59, 7 February 2018

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:

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