SimonJolly at 14:28, 16 August 2017

2017-08-16T14:28:50Z

← Older revision		Revision as of 14:28, 16 August 2017
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	'''JS''':		'''JS''':
	*		* Helping '''Dan Walker''' to update notes for experimental runs.
			* Running through Geant4 tutorials using Eclipse SSH plugin (now built-in to Eclipse C++ version): will write up some notes on editing code with Eclipse via SSH.
			* Will check through background Wiki pages to make sure they're complete.

SimonJolly: Created page with "== Minutes for UCL Proton Calorimetry Meeting, 16th August 2017 (D107, Physics & Astronomy, UCL) == === Present === '''Simon Jolly''', '''Laurent Kelleter''', '''Jordan Silverm..."

2017-08-16T14:20:13Z

Created page with "== Minutes for UCL Proton Calorimetry Meeting, 16th August 2017 (D107, Physics & Astronomy, UCL) == === Present === '''Simon Jolly''', '''Laurent Kelleter''', '''Jordan Silverm..."

New page

== Minutes for UCL Proton Calorimetry Meeting, 16th August 2017 (D107, Physics & Astronomy, UCL) ==

=== Present ===

'''Simon Jolly''', '''Laurent Kelleter''', '''Jordan Silverman'''

'''LK''':
* Ran a [http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2017/LK20170816_Buildup_Redefinition.pdf few more simulations for build-up paper]:
** Bortfeld description fails between 200–300 MeV: at 500 MeV description is very poor (Bortfeld recommends only between 40–200 MeV).
** At 500 MeV "entrance bump" is almost as large as the Bragg peak!
** Electron build-up measured within the simulation by counting energy deposition attributed to electrons at each step.
** Compare dose at depth to dose at 0.07 mm to define build-up (appropriate skin depth): approx. 2% of Bragg peak depth.
** Hadronic build-up defined by secondary protons: several orders of magnitude larger than heavier hadrons.
** Liquid Hydrogen simulations show much smaller entrance bump: secondary proton spectrum still retains Bragg peak (Oxygen no longer disrupting primary proton energy).
** No secondary production of hadrons after Bragg peak in liquid Hydrogen: no neutron production so nothing gets past Bragg peak.
* Testing PRaVDA PRIAPUS CMOS sensor:
** Flashed single scintillator sheets with LED and imaged light with PRIAPUS.
** Checked different scintillator thicknesses (3 and 10 mm) and different LED voltages.
** Checked spacing between sensor and scintillator: need to keep scintillator as close to sensor as possible without touching it! Minimum distance tried was 2 mm.
** Beam test at Birmingham Wednesday 23rd August.

'''JS''':
*

Proton Calorimetry/Meetings/2017/08/16 - Revision history

SimonJolly at 14:28, 16 August 2017

SimonJolly: Created page with "== Minutes for UCL Proton Calorimetry Meeting, 16th August 2017 (D107, Physics & Astronomy, UCL) == === Present === '''Simon Jolly''', '''Laurent Kelleter''', '''Jordan Silverm..."