Proton Calorimetry/Meetings/2018/02/14: Difference between revisions

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** Make up a list of all equipment needed for [[Proton_Calorimetry/Experimental_Runs/2018/Feb21]]
** Make up a list of all equipment needed for [[Proton_Calorimetry/Experimental_Runs/2018/Feb21]]


** Sensor is very early in pCT development: readout is slow (~1,000 frames/s).
'''RS''':
** Potential for pCT collaboration.
* Discussions in Sheffield with '''John MacMillan''' regarding low gain PMT.
** They are sharing experimental time with us at MedAustron on 22/23 March.
* Low gain tubes '''are''' available from RCA, who are long out of business:
** We will have 6 hours on Thursday night and ~4 hours on Friday night.
** Designed for use at very high light levels.
** Will make single module measurements for them: MedAustron rate and pCT calorimetry.
** Only 1 ever made: '''RS''' has obtained it from '''John'''.
** Accommodation is booked: 4 rooms in Orange Wings (close to MedAustron).
** Tube has 5 dynode stages.
* Both Zarges enclosures are finally here:
* We should take to MedAustron!  May not have time to test it before though...
** Smaller one is painted: waiting on specs from ISDI to choose patch panel connectors.
** Larger one just arrived: Derek will paint tomorrow.


'''LK''':
'''LK''':
* Running tests on [http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2018/LK20180207_ScintillatorSheetTestsWithLED.pdf Scintillator Sheets using LED]:
* Running tests on [http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2018/LK20180214_ScintillatorSheet2mmTestsWithLED.pdf 2mm Scintillator Sheets using LED]:
** First tests with Nikon DSLR carried out on 5/6 February.
** All sheets marked with thickness.
** Some sheets not properly painted, so light leaks in around fibre.
** Sheets clamped then aligned to make sure they are perfectly square to camera.
** Camera highly adjustable: '''RS''' suggests running tests with LED settings used for PRIAPUS saturation.
** Using minimum aperture with 6s acquisition.
** Lens aberrations seen with high light levels.
** Using different fibres: very different light output.
** Variation seen across sheet but average light level approximately the same for all sheets.
** Choosing fibre 8 gives more uniform light output from each sheet.
** Some measurements have much higher light levels.
** Repeating measurements gives highly repeatable light level for each sheet.
** Light levels within +/-25%  for each sheet (+-10% for 3mm sheets).
* ''To Do'':
* ''To Do'':
** Some sheets need repainting: will speak to '''Derek Attree'''.
** Visit ISDI on Friday.
** Chasing up ISDI!
** Run through sensor setup.
** Test USB3 patch panel connector.
** Bring back to UCL.
** Finish off analysis.
** Get sensor working.
** Add Remote Desktop information to Wiki.


'''ABF''':
'''JS''':
* Scintillator sheet thickness measurements added to [[http://www.hep.ucl.ac.uk/pbt/wiki/Proton_Calorimetry/Experimental_Runs/2018/FebScintSheets 2018/FebScintSheets Wiki page]].
* Autodesk Inventor currently installing for model construction and STEP-file export.
* ''To Do'':
* ''To Do'':
** Continue LED tests: rerun with settings that saturated PRIAPUS; set up radioactive source.
** Make CAD models of Clatterbridge beamline components.
** Label scintillator sheets.
** Export models as Geant4-compatible components.
** Polish scintillator sheets.
** Rerun simulations to check differences in simulations with CAD components.
** 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''':
* Focussing on buffered event writing in Geant4 to speed up simulations.
* Finished cleaning up simulation:
* Fixed issue by avoiding use of pointers: needed a custom accumulator class.
** Properly commented, neat code.
* Factor of 30 speed up with buffering!
** Buffered readout also cleaned up: just needs to specify certain variables in run macro.
* Code needs tidying up..
* Wiki needs updating.
* In contact with '''Jacinta Yap''' about Clatterbridge simulations:
** Had contact with '''Oleg''' regarding previous simulations.
** A file has been sent, but probably completely wrong...
* Finishing off CDT courses and coursework.
* Reading up on CT reconstruction: Inverse Problems course still running.
* ''To Do'':
* ''To Do'':
** Tidy up Geant4 buffering code.
** Update Wiki.
** Update Wiki.
 
** Finish off Exception handling.
'''JS''':
** Group project submitted end of March.
* [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'':
** Write up scintillator sheet measurements on Wiki page.
** CAD import/export in Geant4.

Latest revision as of 15:25, 14 February 2018

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

Present

Simon Jolly, Ruben Saakyan, Matthieu Hentz, Jordan Silverman, Dan Walker, Laurent Kelleter

DW:

  • Looking into measuring rate of acquisitions for LeCroy scope:
    • No built-in function to do this.
    • Should be possible calculate it using built-in math functions.
    • Manual not particularly clear...
  • Looking at tracker data from Tony Price:
    • Structure very simple: each timestamp also has 5 sets of X-Y-Z data for 4 trackers.
  • To Do:

RS:

  • Discussions in Sheffield with John MacMillan regarding low gain PMT.
  • Low gain tubes are available from RCA, who are long out of business:
    • Designed for use at very high light levels.
    • Only 1 ever made: RS has obtained it from John.
    • Tube has 5 dynode stages.
  • We should take to MedAustron! May not have time to test it before though...

LK:

  • Running tests on 2mm Scintillator Sheets using LED:
    • All sheets marked with thickness.
    • Sheets clamped then aligned to make sure they are perfectly square to camera.
    • Using minimum aperture with 6s acquisition.
    • Using different fibres: very different light output.
    • Choosing fibre 8 gives more uniform light output from each sheet.
    • Some measurements have much higher light levels.
    • Repeating measurements gives highly repeatable light level for each sheet.
    • Light levels within +/-25% for each sheet (+-10% for 3mm sheets).
  • To Do:
    • Visit ISDI on Friday.
    • Run through sensor setup.
    • Bring back to UCL.
    • Get sensor working.

JS:

  • Scintillator sheet thickness measurements added to [2018/FebScintSheets Wiki page].
  • Autodesk Inventor currently installing for model construction and STEP-file export.
  • To Do:
    • Make CAD models of Clatterbridge beamline components.
    • Export models as Geant4-compatible components.
    • Rerun simulations to check differences in simulations with CAD components.

MH:

  • Finished cleaning up simulation:
    • Properly commented, neat code.
    • Buffered readout also cleaned up: just needs to specify certain variables in run macro.
  • Wiki needs updating.
  • In contact with Jacinta Yap about Clatterbridge simulations:
    • Had contact with Oleg regarding previous simulations.
    • A file has been sent, but probably completely wrong...
  • Finishing off CDT courses and coursework.
  • Reading up on CT reconstruction: Inverse Problems course still running.
  • To Do:
    • Update Wiki.
    • Finish off Exception handling.
    • Group project submitted end of March.
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