O. Biebel
Technische Hochschule
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by O. Biebel.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1992
O. Biebel; B. Boden; S. Levegrün; A. Rollnik; S. Schreiber; R. Kowalewski; T. Behnke; H. Breuker; J. Hagemann; M. Hansroul; M. Hauschild; R.D. Heuer; E. Prebys; E. Ros; R. Van Kooten; U. Binder; W. Mohr; O. Schaile; C. Wahl; P. Bock; H.M. Bosch; A. Dieckmann; G. Eckerlin; P. Igo-Kemenes; G. Tysarczyk-Niemeyer; H. von der Schmitt
Abstract The jet chamber of the OPAL experiment at the LEP e + e − collider is designed to measure the direction and the momentum of charged particles as well as the specific energy loss in the chamber gas. The jet chamber has been operated at LEP since August 1989 and has recorded 500 000 hadronic decays of the Z 0 , resulting in a good understanding of the stability and systematics of the chamber. Resolutions obtained in the measurement of particle direction, momentum, and specific energy loss are presented, as well as the corrections and calibration procedures necessary to attain original design goals. A momentum resolution of 6.8% for particles with a momentum of 45 GeV/ c and an energy loss resolution of 3–4% over all momenta have been achieved.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1992
O. Biebel; B. Boden; H. Bö; H. Breuker; S. Bug; A. Eyring; H.M. Fischer; C. Geich-Gimbel; S. Gross; J. Hagemann; M. Hauschild; R.D. Heuer; K. Karner; G. Knop; S. Levegrün; G. Linser; G. Maringer; E. Mauer; U. Maur; B. Nellen; H. Neumann; A. Rollnik; O. Runolfsson; H. von der Schmitt; S. Schreiber; W. Seidl; A. Simon; J. Thiebes; D. Voillat; Arne Wagner
Abstract In this report we describe the construction and performance of the laser system which was used in Summer 1989 for the initial calibration of the OPAL jet chamber after installation on the LEP beam axis and which has served as a monitoring tool since then. Two Nd: YAG lasers are used to generate 48 high precision double beams which enter the chamber at fixed positions. The main features of the roughly 450 optical components are described and the beam alignment procedures are explained. Results are given for jet chamber calibration constants such as drift velocity, Lorentz angle, and residual sagittas.
European Physical Journal C | 1994
R. Akers; G. Alexander; J. Allison; K. J. Anderson; S. Arcelli; A. Astbury; D. Axen; G. Azuelos; J. T. Baines; A. H. Ball; J. Banks; R. J. Barlow; S. Barnett; R. Bartoldus; J. R. Batley; G. Beaudoin; A. Beck; G.A. Beck; J. Becker; C. Beeston; T. Behnke; Ken W Bell; G. Bella; P. Bentkowski; P. Berlich; S. Bethke; O. Biebel; I. J. Bloodworth; P. Bock; B. Boden
AbstractA measurement of
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1992
J. Allison; J. Banks; R. J. Barlow; J. R. Batley; O. Biebel; R. Brun; A. Buijs; F.W. Bullock; C. Y. Chang; J. E. Conboy; R. Cranfield; Gaetano-Marco Dallavalle; M. Dittmar; J.J. Dumont; C. Fukunaga; J. W. Gary; J. Gascon; N. I. Geddes; S. W. Gensler; V. Gibson; J. D. Gillies; J. Hagemann; M. Hansroul; P.F. Harrison; J. C. Hart; P.M. Hattersley; M. Hauschild; R. J. Hemingway; F.F. Heymann; P. R. Hobson
European Physical Journal C | 1991
G. Alexander; J. Allison; S. Arcelli; P. Ashton; A. Astbury; D. Axen; G. Azuelos; G. Beaudoin; A. Beck; J. Becket; T. Behnke; G. Bella; S. Bethke; O. Biebel; U. Binder; P. Bock; S. Bougerolle; H. Breuker; R. Brun; A. Buijs; P. Capiluppi; I. Cohen; M. Cooper; M. Couch; M. Coupland; M. Cuffiani; S. Dado; M. Dallavalle; S. J. De Jong; P. Debu
\Gamma _{b\bar b} /\Gamma _{had} \equiv \Gamma (Z^0 \to b\bar b)/\Gamma (Z^0 \to hadrons)
