LaurentKelleter at 16:54, 17 February 2017

2017-02-17T16:54:35Z

← Older revision		Revision as of 16:54, 17 February 2017
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	== Minutes for UCL Proton Calorimetry Meeting, ~~25th January~~ 2017 (D17, Physics & Astronomy, UCL) ==		== Minutes for UCL Proton Calorimetry Meeting, 15th February 2017 (D17, Physics & Astronomy, UCL) ==

	=== Present ===		=== Present ===

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

			'''MH''':
			* Worked on emittance of protons in Clatterbridge beam line. Need to check size of initial source (beam outside beam pipe!). Maybe switch so coloured plot instead of scatter-plot. Check for secondary protons, too.

	'''AK''':		'''AK''':
	* ~~Working~~ with ~~pulser and~~ LED.		* Made measurements with lower LED frequency. Part of the rate problem is understood: Coming from the frequency dependent signal inverter used for pulser trigger mode. Go to self trigger mode or adapt signal form (NIM to TTL).
	* Running detector emulator into digitiser produces exact replication of ~~spectra as expected.~~
	* Driving LED with detector emulator more problematic: ~~digitiser won't~~ trigger ~~properly on PMT output~~.
	* Driving LED with regular pulses gives similar response to ~~experimental measurements:~~
	** For Hamamatsu base, mean ADC position (~~gain~~) ~~drops with frequency then stabilises around 100kHz;~~
	** For UCL base, ADC mean drops quickly then rises from ~30kHz up to ~450kHz.
	* Will try more measurements at lower and higher frequencies.

	~~'''MH''':~~
	* PDFs of layout sent to Clatterbridge and Carsten Welsch: no response as yet...
	* Measuring the emittance evolution down the Clatterbridge beamline:
	** Original element written by ESA: doesn't work...
	** Will write own custom element for specifying input emittance.

	'''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/LK20170215_BraggAndPhotonFit.pdf Managed to fit Bragg curve and photon yield. Fine tuning necessary
	* Deriving analytic function to ~~describe quenched~~ Bragg ~~Peak very complex...~~and ~~may not be accurate..~~.

SimonJolly: Created page with "== Minutes for UCL Proton Calorimetry Meeting, 25th January 2017 (D17, Physics & Astronomy, UCL) == === Present === '''Simon Jolly''', '''Ruben Saakyan''', '''Anastasia Bashari..."

2017-02-17T15:59:36Z

Created page with "== Minutes for UCL Proton Calorimetry Meeting, 25th January 2017 (D17, Physics & Astronomy, UCL) == === Present === '''Simon Jolly''', '''Ruben Saakyan''', '''Anastasia Bashari..."

New page

== Minutes for UCL Proton Calorimetry Meeting, 25th January 2017 (D17, Physics & Astronomy, UCL) ==

=== Present ===

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

'''AK''':
* Working with pulser and LED.
* Running detector emulator into digitiser produces exact replication of spectra as expected.
* Driving LED with detector emulator more problematic: digitiser won't trigger properly on PMT output.
* Driving LED with regular pulses gives similar response to experimental measurements:
** For Hamamatsu base, mean ADC position (gain) drops with frequency then stabilises around 100kHz;
** For UCL base, ADC mean drops quickly then rises from ~30kHz up to ~450kHz.
* Will try more measurements at lower and higher frequencies.

'''MH''':
* PDFs of layout sent to Clatterbridge and Carsten Welsch: no response as yet...
* Measuring the emittance evolution down the Clatterbridge beamline:
** Original element written by ESA: doesn't work...
** Will write own custom element for specifying input emittance.

'''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...

Proton Calorimetry/Meetings/2017/02/15 - Revision history

LaurentKelleter at 16:54, 17 February 2017

SimonJolly: Created page with "== Minutes for UCL Proton Calorimetry Meeting, 25th January 2017 (D17, Physics & Astronomy, UCL) == === Present === '''Simon Jolly''', '''Ruben Saakyan''', '''Anastasia Bashari..."