SimonJolly at 15:35, 22 February 2017

2017-02-22T15:35:58Z

← Older revision		Revision as of 15:35, 22 February 2017
Line 34:		Line 34:
	** Some particles seem to pass through metal shielding: '''LK''' suggests checking 3-dimensional structure of beamline.		** Some particles seem to pass through metal shielding: '''LK''' suggests checking 3-dimensional structure of beamline.
	** Beamline support needs adding.		** Beamline support needs adding.


	'''LK''':		'''LK''':
	* [http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2017/~~LK20170208_ProtonRangeFromPhotons~~.pdf ~~Looking at getting the proton range (mean proton energy) from a scintillation~~ photon ~~depth distribution~~].		* [http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2017/LK20170222_PhotonFit.pdf Fitting curve to photon yield to check Bragg curve].
	* ~~Deriving analytic function to describe quenched Bragg Peak very complex...and may~~ not ~~be accurate..~~.		* Fit not yet perfect: still using an approximation.

	=== List of equipment for MedAustron ===		=== List of equipment for MedAustron ===

SimonJolly: Created page with "== Minutes for UCL Proton Calorimetry Meeting, 22nd February 2017 (D17, Physics & Astronomy, UCL) == === Present === '''Simon Jolly''', '''Anastasia Basharina-Freshville''', ''..."

2017-02-22T15:05:24Z

Created page with "== Minutes for UCL Proton Calorimetry Meeting, 22nd February 2017 (D17, Physics & Astronomy, UCL) == === Present === '''Simon Jolly''', '''Anastasia Basharina-Freshville''', ''..."

New page

== Minutes for UCL Proton Calorimetry Meeting, 22nd February 2017 (D17, Physics & Astronomy, UCL) ==

=== Present ===

'''Simon Jolly''', '''Anastasia Basharina-Freshville''', '''Laurent Kelleter''', '''Adam Knoetze''', '''Matthieu Hentz'''

'''MSci reports due 27th March.'''

'''AK''':
* Working with pulser and LED.
* Running LED pulser with regular pulse shape and spacing.
* Seeing drops in ADC spectrum peak position from 7400 at 100Hz to 6400 at 5kHz.
* During MedAustron visit will take data using detector emulator.

'''ABF''':
* Testing LED pulser to check whether variation in gain comes from LED or PMT.
* After MedAustron will retest with super-stable SuperNEMO LEDs.
* Taking signal from last dynode rather than anode to avoid final gain stage (~3.5) and saturation.
* Long scintillator bars arrived from Nuvia:
** Wrapped in mylar only to reduce amount of internal reflections.
** Energy resolution worse: ~11% at 1MeV.
* Preparing for MedAustron: '''MH''' and '''LK''' will prepare cables...
* Housing needs modifying to fit long scintillator bar: need to make sure its light tight in case room lights cannot be switched off. '''LK''' suggests using a cardboard box...

'''MH''':
* Still no response from Clatterbridge and Carsten Welsch on PDFs of layout: '''SJ''' will chase it up.
* Simulations of Clatterbridge beamline:
** Tracking emittance evolution.
** Initial beam parameters very large. Will use values from '''Hywel Owen''':
*** σx = 4mm
*** σy = 4.5mm
*** σx' = 2.03mrad
*** σy' = 1.2mrad
** Some particles seem to pass through metal shielding: '''LK''' suggests checking 3-dimensional structure of beamline.
** Beamline support needs adding.

'''LK''':
* [http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2017/LK20170208_ProtonRangeFromPhotons.pdf Looking at getting the proton range (mean proton energy) from a scintillation photon depth distribution].
* Deriving analytic function to describe quenched Bragg Peak very complex...and may not be accurate...

=== List of equipment for MedAustron ===

==== Hand Luggage ====

* Scope
* 2 PMTs + 1 base
* DAQ laptop
* Digitiser
* HV unit
* Scintillator bars

==== Hold ====

* Collimators
* Box
* Signal cables
* HV cables

Proton Calorimetry/Meetings/2017/02/22 - Revision history

SimonJolly at 15:35, 22 February 2017

SimonJolly: Created page with "== Minutes for UCL Proton Calorimetry Meeting, 22nd February 2017 (D17, Physics & Astronomy, UCL) == === Present === '''Simon Jolly''', '''Anastasia Basharina-Freshville''', ''..."