D. Gillespie
CERN
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Featured researches published by D. Gillespie.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1996
W. Adam; E. Albrecht; D. Allen; M.L. Andrieux; G.W. van Apeldoorn; C. Aubret; A. Augustinus; P. Baillon; M. Battaglia; Daniel Bloch; O. Botner; C. Bourdarios; J.M. Brunet; A. Buys; P. Carrié; P. Cavalli; G. Cerutti; M. Chevry; E. Christophel; E. Dahl-Jensen; G. Damgaard; N. Dimitriou; B. Dalmagne; Martyn Davenport; F. Delbecque; J. Dolbeau; M. Dracos; M. Dris; T. Ekelof; J.P. Engel
Abstract The DELPHI experiment has already collected 2.5 million Z 0 decays with the ring imaging Cherenkov detector (RICH) operational. This detector, covering most of the solid angle, is designed to perform π K separation from 0.8 to 20 GeV/ c and K/p separation from 0.8 to 35 GeV/ c . After a brief detector description we discuss the actual operating conditions, the data monitoring and the signal treatment. The collected data from Z 0 decays and the detector response to signals from the calibration system are used to evaluate the performance of the RICH system.
IEEE Transactions on Nuclear Science | 1995
A. Chan; H. B. Crawley; D. Edsall; A. Firestone; M.S. Gorbics; L. Gorn; J. Lamsa; R. McKay; W. T. Meyer; E. I. Rosenberg; W.D. Thomas; Mitchell Wayne; M. Boldini; F. R. Cavallo; V. Giordano; L. Maselli; F. L. Navarria; A. Perrotta; U. Rossi; G. Valenti; C. Bastie; W. H. Bell; H. Burmeister; T. Camporesi; A. Cattai; M. Feindt; H. Furstenau; D. Gillespie; J. P. Martin; S. Schael
The performance of the High-density Projection Chamber (HPC), the barrel electromagnetic calorimeter of the DELPHI experiment, is described. The detector adopts the time projection technique in order to obtain exceptionally fine spatial granularity in the three coordinates (/spl sim/2/spl times/20 mrad/sup 2/ in /spl theta//spl times//spl phi/ with nine samplings along the shower axes), using a limited number of readout channels (18432). Among the various topics concerning the HPC construction and operation, major emphasis is given to the aspects related to the calibration in energy of the calorimeter, based mainly on the analysis of the detector response to /sup 83m/Kr decays, and to the treatment of ageing in the readout proportional counters. >
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1995
W. Adam; E. Albrecht; D. Allen; M.L. Andrieux; G.W. van Apeldoorn; Y. Arnoud; C. Aubret; A. Augustinus; P. Baillon; M. Battaglia; Daniel Bloch; O. Botner; C. Bourdarios; J.M. Brunet; A. Buys; P. Carrié; P. Cavalli; G. Cerutti; M. Chevry; E. Christophel; E. Dahl-Jensen; G. Damgaard; N. Dimitriou; B. Dalmagne; Martyn Davenport; F. Delbecque; J. Dolbeau; M. Dracos; M. Dris; T. Ekelof
Abstract The general purpose particle detector DELPHI at the Large Electron Positron collider at CERN was built to give the complete information of each event. DELPHI uses ring imaging Cherenkov counters to provide hadron identification in most of the momentum range below 45 GeV/ c and over almost the full solid angle. Charged particles traversing gaseous and liquid fluorocarbon radiators create photons used for Cherenkov angle reconstruction. Some of the design features of the detector will be presented, with emphasis on the experience which was gained in the operation of these large systems. The hadron identification power of the ring imaging Cherenkov detector closely meets the main design values. Data processing and performance of the detector will be discussed using dimuon events collected during 1994. Pion rejection factors for kaon tagging will be shown.
