The CPLEAR detector at CERN

R. Adler,W. Albrecht,T. Alhalel,A. Angelopoulos,A. Apostolakis,E. Aslanides,G. Backenstoss,F. Bal,J.P. Bard,D. Barraca, C.P. Bee,O. Behnke,A. Benelli,J. Bennet,V. Bertin,F. Blanc, P. Bloch,M. Bonnet,C. Bula,A. Calzas, P. Carlson,M. Carroll,J. Carvalho,E. Cawley,S. Charalambous,M. Chardalas,G. Chardin,P. Charra,M.B. Chertok,A. Cody,J. da Silva,D. Damianoglou,R. Daniel,M. Danielsson,P. Dechelette,M. Dedieu,S. Dedoussis, M. Dejardin,J. Derre,A. Dijksman,B. Dinkespiller,M. Dodgson,M. Dröge,J. Duclos,N. Dudragne,D. Durand,A. Ealet,B. Eckart,C. Eleftheriadis,C. Engster,I. Evangelou,L. Faravel, P. Fassnacht,J.L. Faure,C. Felder,R. Ferreira-Marques,W. Fetscher,M. Fidecaro,A. Filipčič,D. Francis,J. Fry,C. Fuglesang, E. Gabathuler,Y. Gally,R. Gamet,D. Garreta,D. Geiss, T. Geralis,H.-J. Gerber,A. Go,P. Gumplinger,D. Guyon,C. Guyot,P. Harrison,P.F. Harrison,A. Haselden,P.J. Hayman,E. Hazen,F. Henry-Couannier,W.G. Heyes,R.W. Hollander,E. Hubert,C. Jacobs,K. Jansson,H.U. Johner,K. Jon-And,N. Karkour,A. Kerek,J. Kern,G. Kesseler,P.-R. Kettle,D. King,T. Klados,C. Kochowski,P. Kokkas,K. Kontek,R. Kreuger,T. Lawry,D. Lecouturier,R. Le Gac,F. Leimgruber,D. Linget,A. Liolios,B. Lofstedt,F. Louis,E. Machado,P. Maley,U. Mall,I. Mandić, N. Manthos,G. Marel,C.-P. Marin,H. Martin,J.C. Michau,M. Mikuž,J. Miller,F. Montanet,T. Nakada,F. Nanni,A. Onofre,B. Pagels,I. Papadopoulos,P. Pavlopoulos,F. Pelucchi,P. Petit,K. Philippoussis,J. Pinto da Cunha,A. Policarpo,G. Polivka,H. Postma,Ch. Rheme,R. Rickenbach,B.L. Roberts,E. Rozaki,T. Ruf,L. Sacks,L. Sakeliou,P. Sanders, C. Santoni,K. Sarigiannis,M. Schäfer,L.A. Schaller,T. Schietinger,A. Schopper,P. Schune,A. Soares, M. Steinacher,S. Tatsis, L. Tauscher,C. Thibault, F. Touchard, C. Touramanis,F. Triantis,D.A. Tröster,I. Tsamouranis,H. Tschopp,P. Tsilimigras,E. van Beveren,C.W.E. van Eijk,B. van Koningsveld,J.P. Vanuxem, G. Varner,H. Verweij,S. Vlachos,D. Warner,E. Watson,P. Weber,H. Wendler,O. Wigger,C. Witzig,M. Wolter,C. Yeche,D. Zavrtanik,D. Zimmerman

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment（1996）

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摘要

The CPLEAR collaboration has constructed a detector at CERN for an extensive programme of CP-, T- and CPT-symmetry studies using K0 and K0 produced by the annihilation of p's in a hydrogen gas target. The K0 and K0 are identified by their companion products of the annihilation K±π∓ which are tracked with multiwire proportional chambers, drift chambers and streamer tubes. Particle identification is carried out with a liquid Cherenkov detector for fast separation of pions and kaons and with scintillators which allow the measurement of time of flight and energy loss. Photons are measured with a lead/gas sampling electromagnetic calorimeter. The required antiproton annihilation modes are selected by fast online processors using the tracking chamber and particle identification information. All the detectors are mounted in a 0.44 T uniform field of an axial solenoid of diameter 2 m and length 3.6 m to form a magnetic spectrometer capable of full on-line reconstruction and selection of events. The design, operating parameters and performance of the subdetectors are described.

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关键词

cp violation,scintillation counter

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