Proton Calorimetry/Meetings/2017/03/08 - Revision history

SimonJolly at 15:10, 8 March 2017

2017-03-08T15:10:48Z

← Older revision		Revision as of 15:10, 8 March 2017
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	* Ignoring protons that fall outside the measurement region in simulations.		* Ignoring protons that fall outside the measurement region in simulations.
	* Need to check initial parameters and beam density distributions: will plot intensity distributions to make it clearer.		* Need to check initial parameters and beam density distributions: will plot intensity distributions to make it clearer.
	* Updated geometry based on information from Andrzej's.		* Updated geometry based on information from Andrzej.

	'''AK''':		'''AK''':
	* [http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2017/AKnoetze_Hamamatsu_SelfTrig_2.14V_08.03.2017.pdf Looking at Hamamatsu PMT response to LED].		* [http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2017/AKnoetze_Hamamatsu_SelfTrig_2.14V_08.03.2017.pdf Looking at Hamamatsu PMT response to LED].
	* '''RS''' and '''ABF''' will walk through results to suggest improvements.		* '''RS''' and '''ABF''' will walk through results to suggest improvements.

			'''ABF''':
			* Started looking at data from MedAustron experimental runs.
			* 0.7% FWHM energy resolution at 252MeV!
			* Will continue analysing results: can distribute to collaborators once complete.

			'''LK''':
			* [http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2017/LK20170308_PhotonFit.pdf Still looking at photon depth curve in simulations].
			* Improved y errors: includes fluctuation in energy deposition.
			* Fit looks good but not perfect around Bragg peak.
			* Errors on fitted energy underestimated but final range close to reality.
			* '''SJ''' suggests contacting '''Roger Barlow''' (Huddersfield) to discuss fit accuracy.
			'''

SimonJolly at 14:42, 8 March 2017

2017-03-08T14:42:26Z

@@ Line 23: / Line 23: @@
 '''AK''':
 * [http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2017/AKnoetze_Hamamatsu_SelfTrig_2.14V_08.03.2017.pdf Looking at Hamamatsu PMT response to LED].
+* '''RS''' and '''ABF''' will walk through results to suggest improvements.

SimonJolly: Created page with "== Minutes for UCL Proton Calorimetry Meeting, 8th March 2017 (D17, Physics & Astronomy, UCL) == === Present === '''Simon Jolly''', '''Ruben Saakyan''', '''Anastasia Basharina-..."

2017-03-08T14:40:55Z

Created page with "== Minutes for UCL Proton Calorimetry Meeting, 8th March 2017 (D17, Physics & Astronomy, UCL) == === Present === '''Simon Jolly''', '''Ruben Saakyan''', '''Anastasia Basharina-..."

New page

== Minutes for UCL Proton Calorimetry Meeting, 8th March 2017 (D17, Physics & Astronomy, UCL) ==

=== Present ===

'''Simon Jolly''', '''Ruben Saakyan''', '''Anastasia Basharina-Freshville''', '''Laurent Kelleter''', '''Adam Knoetze''', '''Matthieu Hentz''', '''Andreas Christou''', '''Jordan Silverman'''

'''AC''':

* Working on waveform fitting in ROOT:
** Gaussian part of the fit works.
** Trying to fit falling edge of pulse using single exponential.
** Will try implementing double exponential.
* Can already filter out pulses with more than one peak:
** Will reconstruct ADC spectrum from filtered waveforms.
** Will vary integration window for pulse (50, 100, 150ns used in experiment).

'''MH''':
* Looking at emittance and beam profile evolution along Clatterbridge beamline.
* Ignoring protons that fall outside the measurement region in simulations.
* Need to check initial parameters and beam density distributions: will plot intensity distributions to make it clearer.
* Updated geometry based on information from Andrzej's.

'''AK''':
* [http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2017/AKnoetze_Hamamatsu_SelfTrig_2.14V_08.03.2017.pdf Looking at Hamamatsu PMT response to LED].

'''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...

'''LK''':
* [http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2017/LK20170222_PhotonFit.pdf Fitting curve to photon yield to check Bragg curve].
* Fit not yet perfect: still using an approximation.