CERN Accelerating science

Preprint
Report number	JINR-P13-2003-102 ; P13-2003-102
Title	PIBETA Spectrometer for Investigation of Rare and Forbidden Decays of Muons and Pions
Author(s)	Frlez, E ; Povcanic, D ; Li, W ; Minehart, R C ; Smith, L C ; Stephens, W A ; Zionk, K O H ; Bertl, W ; Horisberger, R P ; Ritt, S ; Schnyder, R ; Wirtz, H P ; Baranov, V A ; Kalinnikov, V A ; Karpukhin, V V ; Khomutov, N V ; Korenchenko, S M ; Kravchuk, N P ; Kuchinskii, N A ; Mzhavia, D A ; Rozhdestvensky, A M ; Sidorkin V V ; Tsamalaidze, Z ; Sakhelashvili, T M ; Titchie, B G ; Supek, I ; Kozlovsky, T
Affiliation	(Dzhelepov Laboratory of Nuclear Problems, Dubna) ; (Department of Physics, University of Virginia, Charlottesville, VA 22904-4714, USA) ; (Paul Sherrer Institute, CH-5232 Villigen PSI, Switzerland) ; (Tbilisi State University, Georgia) ; (Department of Physics and Astronomy, Arizona State University, Tempe, AZ 85287, USA) ; (Rudjer Bo\v{s}kovi\'{c} Institute, HR-10000 Zagreb, Croatia) ; (Institute for Nuclear Studies, PL-05-400 Swierk, Poland)
Publication	2003
Imprint	29 May 2003
Number of pages	19
Published in:	Prib. Tekh. Eksp.
Subject category	Detectors and Experimental Techniques
Abstract	Design, contribution and performance of the PIBETA spectrometer intended for the precise measurement of the pion beta decay, \pi^{+}\to\pi^{0}+e^{+}+\nu_{e}, at the Paul Scherrer Institute (PSI, Switzerland) are described. The central part of the detector is a 240-module spherical pure CsI calorimeter covering \sim 3\pi sr solid angle. The calorimeter is supplemented with active collimator/beam degrader, an active segmented plastic target, a pair of low-mass cylindrical multiwire chambers, a 20-element cylindrical plastic scintillator hodoscope and cosmic muon plastic veto counters.
Submitted by	[email protected]