E. Albrecht
CERN
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by E. Albrecht.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2003
E. Albrecht; Günter Baum; T. Bellunato; A. Bressan; S. Dalla Torre; C. D'Ambrosio; Martyn Davenport; M. Dragicevic; S. Duarte Pinto; P. Fauland; S. Ilie; G. Lenzen; P. Pagano; D. Piedigrossi; F. Tessarotto; O. Ullaland
The optical transparency of perfluorocarbons used as Cherenkov media is of prime importance to many Ring Imaging Cherenkov detectors. We will in this paper show that the main photon absorbers in these fluids are hydrocarbons with double or triple bonds. We will moreover discuss a process which can eliminate these pollutants and restore the intrinsic excellent optical transparency of these fluids in the VUV range.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1994
Wolfgang Adam; E. Albrecht; I. Ambec; A. Augustinus; C. Barnoux; B. Boštjančič; O. Botner; A.P. Budziak; L. Caloba; P. Carecchio; P. Cavalli; L. Ceelie; R. Cereseto; G. Cerutti; E. Dahl-Jensen; G. Damgaard; N. de Koning; A.S. de la Vega; N. Dimitriou; W. Dulinski; L.-O. Eek; T. Ekelof; J. Erikson; A. Florek; B. Florek; F. Fontanelli; A. Fontanelle; K. Galuszka; Jorge-Armando Benitez Garcia; V. Gracco
The Forward Ring Imaging Cherenkov detector of the DELPHI experiment at LEP provides hadron identification at polar angles15° < θ < 35° and 145° < θ < 165°. Two radiator media, a layer of liquid C6F14 and a volume of gaseous C4F10, in combination provide coverage of momenta up to 40 GeV/c. A single array of photosensitive Time Projection Chambers registers the impact points of ultraviolet photons from both radiators. The design of the detector and of its readout system is described. First results obtained with a partly installed detector are reported.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2003
E. Albrecht; Günter Baum; R. Birsa; F. Borotto; F. Bradamante; A. Braem; A. Bressan; A. Chapiro; A. Cicuttin; C. D'Ambrosio; A. Colavita; S. Costa; M.L. Crespo; J. Ch. Gayde; S. Dalla Torre; V. Diaz; V. Duic; L. Fernandez Hernando; P. Fauland; Mir. Finger; F. Fratnik; M. Giorgi; B. Gobbo; R. Ijaduola; V. Kalinnikov; M. Lamanna; A. Martin; M Laub; M. Marengo; P. Pagano
The architecture and the properties of the mirror system of the COMPASS RICH-1 detector, composed by 116 spherical VUV reflecting units supported by a lightweight mechanical structure, are described.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2003
E. Albrecht; Günter Baum; T. Bellunato; R. Birsa; M. Bosteels; F. Bradamante; A. Bressan; A. Chapiro; A. Cicuttin; A. Colavita; S. Costa; M.L. Crespo; S. Dalla Torre; V. Diaz; V. Duic; P. Fauland; F. Fratnik; M. Giorgi; B. Gobbo; R. Ijaduola; V. Kalinnikov; M. Lamanna; A. Martin; P. Pagano; P. Schiavon; F. Tessarotto; A. Zanetti
The design of the COMPASS RICH-1 gas system, its operational modes, the cleaning setups for the preparation of the radiator gas and transmission measurement installations are described. The gas system in presently fully operational and satisfactory transmission of VUV light through the radiator gas has been reached.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1999
E. Albrecht; G.W. van Apeldoorn; A. Augustinus; P. Baillon; M. Battaglia; Daniel Bloch; E. Boudinov; J.M. Brunet; P. Carrié; P. Cavalli; E. Christophel; M. Davenport; M. Dracos; L. Eklund; B. Erzen; P.A. Fischer; E. Fokitis; F. Fontanelli; V. Gracco; A. Hallgren; C. Joram; P. Juillot; N. J. Kjaer; P. Kluit; G. Lenzen; D. Liko; J R Mahon; Stavros Maltezos; A. Markou; N. Neufeld
The Ring Imaging Cherenkov detectors of DELPHI represent a large-scale particle identification system which covers almost the full angular acceptance of DELPHI. The combination of liquid and gas radiators (C4F10, C5F12, and C6F14) provides particle identification over the whole secondary particle momentum spectrum at LEP I and LEP II. Continuing optimisation on the hardware as well as on the online and offline software level have resulted in a stable operation of the complete detector system for more than five years at full physics performance.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2003
E. Albrecht; Günter Baum; R. Birsa; M. Bosteels; F. Bradamante; A. Braem; A. Bressan; A. Cicuttin; P. Ciliberti; A. Colavita; S. Costa; M.L. Crespo; P. Cristaudo; S. Dalla Torre; V. Diaz; P. Fauland; M. Finger; F. Fratnik; M. Giorgi; B. Gobbo; A. Grasso; R. Ijaduola; V. Kalinnikov; M. Lamanna; M Laub; A. Martin; G. Menon; P. Pagano; D. Panzieri; D. Piedigrossi
RICH-1, one of the key detectors of the COMPASS experiment at CERN SPS, is described. Photon detectors are MWPCs equipped with CsI photo-cathodes.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2002
E. Albrecht; J Baker; G. Barber; J.H. Bibby; M. Calvi; M. Charles; A. Duane; S. Easo; S. Eisenhardt; L. Eklund; M. French; V. Gibson; A.W. Halley; R. Halsall; N. Harnew; M. John; S.G. Katvars; J Libby; F. Muheim; M Paganoni; A. Petrolini; S. Playfer; D. Price; J. Rademacker; N. Smale; S Topp-Jorgenson; D. Websdale; G. Wilkinson; Stephen Wotton
A cluster of multi-anode photomultiplier tubes (MaPMTs) equipped with focusing lenses in front of the tubes was tested in a prototype ring imaging Cherenkov (RICH) detector in a charged particle beam. The readout electronics were capable of capturing the data at 40 MHz. The effects due to charged particles and magnetic field on the MaPMT performance were also studied. The results are used to evaluate the MaPMT as a possible photodetector for the LHCb RICH detectors.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1998
E. Albrecht; G. Barber; J.H. Bibby; N.H Brook; A. Duane; M. French; V. Gibson; R.H. Giles; A.W. Halley; N. Harnew; M. John; D.G. Miller; V. O'Shea; R. Schomaker; N. Smale; D. Websdale; G. Wilkinson; Stephen Wotton
Abstract A ring-imaging Cherenkov detector, equipped with hybrid photon detectors, has been operated in a charged-particle beam. Focussed ring images from various particle types were detected using silica aerogel, air and C 4 F 10 gas radiators. The detector, a prototype for the CERN LHC-B experiment, is described and first observations are reported.
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.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1999
E. Albrecht; M. Alemi; G. Barber; J.H. Bibby; N.H Brook; A. Duane; S. Easo; L. Eklund; V. Gibson; T. Gys; A.W. Halley; N. Harnew; M. John; D. Piedigrossi; B. Simmons; N. Smale; P Teixeira-Dias; D. Websdale; S.A. Wotton; Ken Wyllie
Abstract Beam tests were performed in 1998 to investigate the performance of a prototype of the downstream RICH of the LHCb using hybrid photo-diodes and multi anode PMTs. The angular resolutions obtained from these photodetectors under various experimental configurations are compared with the expectations from simulation.
