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Design, Commissioning and Performance of the PIBETA Detector at PSI | | E. Frlez
; D. Pocanic
; K.A. Assamagan
; Yu. Bagaturia
; V.A. Baranov
; W. Bertl
; Ch. Broennimann
; M.A. Bychkov
; J.F. Crawford
; M. Daum
; Th. Fluegel
; R. Frosch
; R. Horisberger
; V.A. Kalinnikov
; V.V. Karpukhin
; N.V. Khomutov
; J.E. Koglin
; A.S. Korenchenko
; S.M. Korenchenko
; T. Kozlowski
; B. Krause
; N.P. Kravchuk
; N.A. Kuchinsky
; W. Li
; D.W. Lawrence
; R.C. Minehart
; D. Mzhavia
; H. Obermeier
; D. Renker
; B.G. Ritchie
; S. Ritt
; T. Sakhelashvili
; R. Schnyder
; V.V. Sidorkin
; P.L. Slocum
; L.C. Smith
; N. Soic
; W.A. Stephens
; I. Supek
; Z. Tsamalaidze
; B.A. VanDevender
; Y. Wang
; H.-P. Wirtz
; K.O.H. Ziock
; | | Date: |
4 Dec 2003 | | Journal: | Nucl.Instrum.Meth. A526 (2004) 300-347 | | Subject: | High Energy Physics - Experiment; Instrumentation and Detectors | hep-ex physics.ins-det | | Abstract: | We describe the design, construction and performance of the PIBETA detector built for the precise measurement of the branching ratio of pion beta decay, pi+ -> pi0 e+ nu, at the Paul Scherrer Institute. The central part of the detector is a 240-module spherical pure CsI calorimeter covering 3*pi sr solid angle. The calorimeter is supplemented with an active collimator/beam degrader system, an active segmented plastic target, a pair of low-mass cylindrical wire chambers and a 20-element cylindrical plastic scintillator hodoscope. The whole detector system is housed inside a temperature-controlled lead brick enclosure which in turn is lined with cosmic muon plastic veto counters. Commissioning and calibration data were taken during two three-month beam periods in 1999/2000 with pi+ stopping rates between 1.3*E3 pi+/s and 1.3*E6 pi+/s. We examine the timing, energy and angular detector resolution for photons, positrons and protons in the energy range of 5-150 MeV, as well as the response of the detector to cosmic muons. We illustrate the detector signatures for the assorted rare pion and muon decays and their associated backgrounds. | | Source: | arXiv, hep-ex/0312017 | | Services: | Forum | Review | PDF | Favorites | |
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