S. Delorme
CERN
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Featured researches published by S. Delorme.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1992
E. Anassontzis; G.W. van Apeldoorn; E. Aria; C. Aubret; P. Baillon; J.D. Berst; Daniel Bloch; C. Bourdarios; N. Brummer; J.M. Brunet; P. Carrié; M. Chevry; E. Christophel; B. D'Almagne; P. Van Dam; Martyn Davenport; S. Delorme; J. Dolbeau; M. Dracos; M. Dris; W. Dulinski; J.P. Engel; G. Evers; D. Fassouliotis; T.A. Filippas; E. Fokitis; D. Fraissard; E. Gaumann; E. N. Gazis; B. Goret
Abstract A short explanation is given of the Barrel Ring Imaging CHerenkov (BRICH) detector and its performance. We discuss in brief some of the requirements to run this detector. Special attention is paid to the functioning of the Cherenkov photon detector — a photosensitive gas-filled drift chamber where the photoelectrons drift to a MWPC of special construction. We illustrate the BRICH performance with some preliminary results.
ieee nuclear science symposium | 1990
E.G. Anassontzis; P. Ioannou; G. Kalkanis; S. Katsanevas; I. Kontaxis; C. Koukoumelis; S. Nounos; P. Preve; L.K. Resvanis; J.M. Brunet; J. Dolbeau; L. Guglielmi; F. Ledroit; D. Poutot; G. Tristram; P. Baillon; M. Barranco-Luque; M. Davenport; S. Delorme; J. Dixon; M. Dracos; D. Fraissard; J.B. Franco; E. Gaumann; B. Goret; F. Hahn; S. Haider; W. Klempt; B. Koene; G. Lecoeur
The DELPHI detector installed in the LEP (Large Electron-Positron Collider) is equipped with RICH (ring imaging Cherenkov) counters. The barrel part incorporates a liquid (C/sub 6/F/sub 14/) and a gaseous (C/sub 5/F/sub 12/) radiator, providing particle identification up to 20 GeV/c. The Cherenkov photons of both radiators are detected by TPC (time projection chamber)-like photon detectors. The drift gas (75% CH/sub 4/+25% C/sub 2/H/sub 6/) is doped with TMAE (tetrakis-dimethylamine-ethylene) by which the ultraviolet Cherenkov photons are converted into single free photoelectrons. These are drifted towards multiwire proportional chambers at the end of the drift tubes, and the space coordinates of the conversion point are determined. One half of the barrel RICH is now equipped with drift tubes and has provided results from the liquid radiator since spring 1990. The gas radiator has been tested with C/sub 2/F/sub 6/ as a preliminary filling since August 1990. The data obtained demonstrate the good particle identification potential. For the liquid radiator, the number of detected photons per ring in hadron jets is N=8, whereas for muon pairs (single tracks) N=10 has been obtained. For the gas radiator, 2.1 photons per track were observed, which demonstrates good functioning of the focussing mirrors. >
