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Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1990

Influence of the electric field on compensation in a uranium/tetramethylpentane hadronic calorimeter

C. Bacci; A. Bezaguet; D. Bloess; A. Caner; F. Cavanna; F.J. Diez-Hedo; D. Drijard; L. Dumps; A. DiCiaccio; H. Evans; A. Fernando; A. Givernaud; A. Gonidec; M.I. Josa; M. Krammer; F. Lacava; M. Lindgren; C. Markou; G. Maurin; K. Morgan; R.C. Muñoz; L. Naumann; Emilio Petrolo; A. Placci; L. Pontecorvo; E. Radermacher; D. Robinson; T. Rodrigo; C. Rubbia; J. Salicio

Abstract A uranium tetramethylpentane hadronic calorimeter has been tested using electrons and pions of 7 GeV/ c momentum with electric fields varying from 0.8 to 16.0 kV/cm; the e/π charge collection ratio has been measured as a function of the electric field within this range. It is observed that the e/π ratio can be tuned acting on the electric field without spoiling the energy resolution for electrons. At the same time the energy resolution for pions is improved. The effect was cross-checked using a second module and 40 GeV/ c electron and pion beams.


Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1991

Performance of a semi-octagonal-shaped uranium/tetramethylpentane calorimeter

C. Bacci; A. Bezaguet; D. Bloess; A. Caner; F. Cavanna; F.J. Diez-Hedo; D. Drijard; L. Dumps; H. Evans; A. Ferrando; A. Givernaud; A. Gonidec; M.I. Josa; M. Krammer; M.A. Marquina; G. Maurin; K. Morgan; R.C. Muñoz; L. Naumann; P. Nedelec; Emilio Petrolo; A. Placci; L. Pontecorvo; E. Radermacher; D. Robinson; T. Rodrigo; C. Rubbia; J. Salicio; D. Schinzel; C. Seez

Abstract A section of the UA1 uranium/tetramethylpentane forward calorimeter has been tested with muon and electron beams from the CERN Super Proton Synchrotron. The module has a semi-octagonal shape, so that it will closely surround the beam pipe in the end-cap calorimeter region. The mechanical and electrical requirements of this design, needed to provide a full hermeticity for a large detector, have been successfully solved to achieve an excellent overall response of the calorimeter.


Physics Letters B , 253 (3-4) pp. 503-510. (1991) | 1991

Measurement of the ratio R≡σ W Br(W→μν)/σ z Br (Z→μμ) and Γ W tot at the CERN proton-antiproton collider

C. Albajar; M. Albrow; O.C. Allkofer; K. Ankoviak; R. J. Apsimon; B. Aubert; C. Bacci; S. Bartha; G. Bauer; A. Bettini; A. Bezaguet; P. Biddulph; H. Bohn; A. Böhrer; R. Bonino; K. Bos; M. Botlo; D. Brockhausen; C. Buchanan; B. Buschbeck; G. Busetto; A. Caner; P. Casoli; H. Castilla-Valdez; F. Cavanna; P. Cennini; S. Centro; F. Ceradini; G. Ciapetti; Sergio Cittolin


Archive | 1987

SEARCH FOR B°-B ° OSCILLATIONS AT THE CERN

C. Albajar; M. Albrow; O.C. Allkofer; G. Arnison; A. Astbury; T. Axon; T.C. Bacon; A. Bezaguet; K. Bos; G. Bunce; Sergio Cittolin; J. Colas; M. Corden; M. Debeer; J.P. Debrion; M. Della Negra; M. Demoulin; B. Denby; L. Dobrzynski; E. Duchovni; R. Edgecock; K. Eggert; E. Eisenhandler; Faissner P; I.F. Fensome; M. Fincke-Keeler; L. Gately; P. Ghez; P. Giacomelli; W. R. Gibson

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