B. Beaugiraud
Centre national de la recherche scientifique
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Featured researches published by B. Beaugiraud.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1992
B. Aubert; A. Bazan; B. Beaugiraud; J. Colas; T. Leflour; M. Maire; J.P. Vialle; I. Wingerter-Seez; Y. Zolnierowski; Howard Gordon; V. Radeka; D. Rahm; D. Stephani; J.L. Chevalley; Christian Fabjan; D. Fournier; A. Franz; O. Gildemeister; P. Jenni; Marzio Nessi; F. Nessi-Tedaldi; M. Pepe; W. Richter; J. Soderqvist; J.M. Baze; L. Gosset; P. Lavocat; J.P. Lottin; B. Mansoulie; J. Meyer
Abstract A prototype lead-liquid-argon electromagnetic calorimeter with parallel plates and Accordion geometry has been equipped with high speed readout electronics and tested with electron and muon beams at the CERN SPS. For a response peaking time of about 35 ns, fast enough for operation at the future hadron colliders, the energy resolution for electrons is 9.6%/√E[GeV] with a local constant term of 0.3% and a noise contribution of 0.33 E[ GeV ] . The spatial accuracy achieved with a detector granularity of 2.7 cm is 3.7 mm E[ GeV ] and the angular resolution 12 mrad at 60 GeV.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1993
B. Aubert; A. Bazan; B. Beaugiraud; J. Colas; T. Leflour; M. Maire; J.P. Vialle; I. Wingerter-Seez; Y. Zolnierowski; Howard Gordon; V. Radeka; D. Rahm; D. Stephani; N. Bulgakov; J.L. Chevalley; Christian Fabjan; D. Fournier; O. Gildemeister; P. Jenni; Marzio Nessi; F. Nessi-Tedaldi; M. Pepe; W. Richter; J. Soderqvist; V. Vuillemin; J.M. Baze; L. Gosset; P. Lavocat; J.P. Lottin; B. Mansoulie
Abstract A prototype liquid argon preshower detector with a strip granularity of 2.5 mm has been tested at the CERN SPS in front of a liquid argon Accordion calorimeter. For charged tracks a signal-to-noise ratio of 9.4 and a space resolution of 340 μm were measured; the rejection power against overlapping photons produced in the decay of 50 GeV π 0 s is larger than 3; the precision on
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1993
B. Aubert; A. Bazan; B. Beaugiraud; J. Colas; T. Leflour; M. Maire; J.P. Vialle; I. Wingerter-Seez; Y. Zolnierowski; H. A. Gordon; V. Radeka; D. Rahm; D. Stephani; N. Bulgakov; J.L. Chevalley; C. Fabjan; D. Fournier; O. Gildemeister; P. Jenni; M. Nessi; F. Nessi-Tedaldi; M. Pepe; W. Richter; J. Soderqvist; V. Vuillemin; J.M. Baze; L. Gosset; P. Lavocat; J.P. Lottin; B. Mansoulie
Abstract A prototype of a lead liquid argon accordion calorimeter with two types of cylindrical geometry was constructed and equipped with high speed readout electronics. The energy resolution for electrons is 10%/√E (GeV) with a local constant term of 0.65%. The resolutions obtained for position and angular measurements are given.
nuclear science symposium and medical imaging conference | 1991
B. Aubert; A. Bazan; B. Beaugiraud; J. Colas; M. Lebeau; T. Leflour; J.C. MeMarec; M. Maire; P. Petitpas; J. Thion; J.P. Vialle; I. Wingerter-Seez; H. A. Gordon; V. Radeka; D. Rahm; D. Stephani; J.L. Chevalley; C. Fabjan; A. Franz; P. Farthouat; O. Gildemeister; P. Jenni; M. Lefebvre; M. Nessi; F. Nessi-Tedaldi; M. Pepe; W. Richter; G.R. Stevenson; W. Willis; J.M. Baze
Summary form only given. A research and development program is being conducted in view of realizing an electromagnetic and hadronic calorimeter for the Large Hadron Collider (LHC). The authors report on tests on fast electronics, coupled to an electromagnetic prototype calorimeter built with an accordion structure. Three different types of preamplifiers have been used. In two (Si and GaAs hybrids), the preamplifier is operated in liquid argon. In the third one, a common based (Si JFET or GaAs) transistor is in the liquid, the charge preamplifier being outside the cryostat, after about 6 m of 50- Omega cable. The shaping amplifier uses RC-CR filtering. The response to a short current pulse peaks after about 20 ns. When the system is connected to the calorimeter, the liquid argon signals peak, as expected, after 30 ns. Noise, linearity, and cross-talk between channels were investigated. First results from an exposure of the calorimeter to electrons of energy 30 to 175 GeV were obtained.<<ETX>>
Prepared for | 1990
D. Fournier; D.V. Camin; C. Birattari; L. Iconomidou-Fayard; S. Rescia; C. De La Taille; A. Ferrari; M. Pepe; J.M. Gaillard; B. Mansoulie; P. Petroff; G. Parrour; J. Teiger; J. Colas; C. Fuglesang; G. Guilhem; J.P. Vialle; A. Daba; J.F. Renardy; A. C. Schaffer; M. Maire; G.R. Stevenson; G. Battistoni; J.C. Chollet; M. Nessi; E. Auge; D. Rahm; L. Mandelli; J.P. Repellin; V. Radeka
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Laboratoire d'Annecy-le-Vieux de physique des particules
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