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SUMMARY:The Large Angle Photon Veto System for the NA62 Experiment at CERN
DTSTART;VALUE=DATE-TIME:20110609T224000Z
DTEND;VALUE=DATE-TIME:20110609T230000Z
DTSTAMP;VALUE=DATE-TIME:20130619T041732Z
UID:indico-contribution-59@cern.ch
DESCRIPTION:Speakers: PALLADINO\, Vito (INFN\, Sezione di Roma "La Sapienz
 a")\nThe branching ratio (BR) for the decay K+ -> pi+ nu anti-nu is about 
 10-10 and can be predicted in the Standard Model with minimal theoretical 
 uncertainties\, making it a sensitive probe for new physics. Measurement o
 f this BR is challenging because of the background from dominant channels.
  The goal of the NA62 experiment is to measure this BR to within about 10%
 . \nA system of photon vetoes is needed to reject e.g. pi0's from K+ -> pi
 + pi0. We describe the design and construction of one of the main componen
 ts of the photon veto system: the large-angle vetoes (LAV)\, a series of 1
 2 ring-shaped detectors stationed at intervals of about 10 m along the bea
 m line. The LAVs make creative reuse of lead-glass blocks recycled from th
 e OPAL electromagnetic calorimeter barrel. We describe the mechanical desi
 gn and challenges faced during construction\, the development of front-end
  electronics to allow simultaneous time and energy measurements over an ex
 tended dynamic range using the time-over-threshold technique\, and the dev
 elopment of an in situ calibration and monitoring system. Our results are 
 based on test beam data taken to assist the design of the LAV detectors.\n
 \nhttp://indico.cern.ch/contributionDisplay.py?contribId=59&sessionId=15&c
 onfId=102998
LOCATION:Sheraton Hotel Ontario
URL:http://indico.cern.ch/contributionDisplay.py?contribId=59&sessionId=15
 &confId=102998
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