R. Leiste
CERN
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Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1994
M. Acciarri; A. Adam; O. Adriani; S. Ahlen; J. Alcaraz; G. Ambrosi; E. Babucci; L. Baksay; A. Baschirotto; R. Battiston; W. Baur; A. Bay; Gy.L. Bencze; B. Bertucci; M. Biasini; G. M. Bilei; G.J. Bobbink; J. Boissevain; M. Bosetti; M. L. Brooks; W.J. Burger; J. Busenitz; C. Camps; M. Caria; G. Castellini; R. Castello; B. Checcuccl; A. Chen; T.E. Coan; V. Commichau
Abstract The design and construction of the silicon strip microvertex detector (SMD) of the L3 experiment at LEP are described. We present the sensors, readout electronics, data acquisition system, mechanical assembly and support, displacement monitoring systems and radiation monitoring system of the recently installed double-sided, double-layered SMD. This detector utilizes novel and sophisticated techniques for its readout.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2002
O. Adriani; M. van den Akker; S. Banerjee; J. Bähr; B. Betev; D. Bourilkov; S. Bottai; G. J. Bobbink; A.M. Cartacci; M. Chemarin; G. Chen; Hf Chen; T. Chiarusi; C.J. Dai; L.K. Ding; I. Duran; G. Faber; J. Fay; H.J. Grabosch; H. Groenstege; Y.N. Guo; S.K. Gupta; Ch. Haller; Y. Hayashi; Z.X. He; T. Hebbeker; H. Hofer; H. Hoferjun; A.X. Huo; N. Ito
AbstractThe L3 detector at the CERN electron–positron collider, LEP, has been employed for the study of cosmic ray muons.The muon spectrometer of L3 consists of a set of high-precision drift chambers installed inside a magnet with avolume of about 1000 m 3 and a field of 0:5T: Muon momenta are measured with a resolution of a few percentat 50 GeV: The detector is located under 30 m of overburden. A scintillator air shower array of 54 m by 30 mis installed on the roof of the surface hall above L3 in order to estimate the energy and the core position of theshower associated with a sample of detected muons. Thanks to the unique properties of the L3þC detector, muonresearch topics relevant to various current problems in cosmic ray and particle astrophysics can be studied. r 2002Elsevier Science B.V. All rights reserved. PACS: 95.55.Vj; 98.70.Sa; 96.40.Tv; 95.85.RyKeywords: L3+C detector; Cosmic rays; Muon spectrum; Astroparticle physics 1. IntroductionThe L3þ C experiment (Figs. 1 and 2), installedat the Large Electron Positron collider (LEP) atCERN, Geneva, consists of two major parts:firstly, below ground, the L3 muon spectrometer[1], which is comprised of a large 0:5 T magnetwith a volume of 1000 m
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1995
M. Acciarri; A. Adam; O. Adriani; S. Ahlen; J. Alcaraz; G. Ambrosi; H. Andersson; V. Andreev; E. Babucci; L. Baksay; A. Baschirotto; R. Battiston; A. Bay; Gv.L. Bencze; B. Bertucci; M. Biasini; G. M. Bilei; G. J. Bobbink; M. Bosetti; V. Brigljevic; M. L. Brooks; W.J. Burger; J. Busenitz; C. Camps; M. Caria; G. Castellini; B. Checcucci; A. Chen; E. Choumilov; V. Choutko
Abstract The status of the Silicon Microvertex Detector (SMD) and its installation into the LEP-L3 experiment are presented, highlighting novel features and sophisticated techniques. Preliminary results based on 1993 data are given and compared with Monte Carlo predictions, to understand the detector performances and its tracking capabilities.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1986
H. Anderhub; H. Anders; S. Ansari; R. Becker; R. Becker-Szendy; F. Beissel; A. Böhm; M. Bourquin; J.D. Burger; M. Chen; V. Commichau; E. Deffur; K. Deiters; M. Deutschmann; M. Dhina; K.J. Draheim; J. Fehlmann; D. G. Fong; L. Garrido; U. Gessner; Hanspeter von Gunten; K.Z. Guo; E. Haerdi; K. Hangarter; R. Hausammann; U. Herten; H. Hofer; K. Hofmann; U. Horisberger; D. Hueser
Abstract The design and results from a beam test for a small vertex detector, now installed in the DESY MARK J experiment, are presented. The concept of this drift chamber is based on the time expansion principle with readout planes inclined to solve the left-right ambiguity. A spatial resolution of 35 μm, varying weakly as a function of drift length and azimuthal angle, has been achieved.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1992
H. Akbari; G. Alverson; H. Anderhub; J. Bao; F. Behner; J. Behrens; F. Beissel; B.L. Betev; A. Biland; A. Böhm; C. Camps; C.Y. Chien; V. Commichau; K. Dieters; A. Donat; L. Djambazov; P. H. Fisher; W. Freibel; P. Göttlicher; M. Haensli; K. Hangarter; A. Hasan; R. Heller; U. Herten; H. Hofer; M. Glaubman; H. Jung; I. Leedom; R. Leiste; H. Liebmann
Abstract The L3 vertex detector is comprised of the time expansion chamber (TEC), the Z -chamber and a layer of plastic scintillating fibers. The TEC has shown a high spatial resolution and an excellent multi-track reconstruction capability at LEP luminosity. The Z -chamber provides information about the z -coordinates of the tracks and the fibers are used for calibrating the drift velocity with a high precision. A description of the L3 vertex detector, its readout and data acquisition and its performance during the 1990 LEP running period is presented in this paper.
Physics Letters B | 1986
B. Adeva; H. Anderhub; S. Ansari; U. Becker; R. Becker-Szendy; J. Berdugo; A. Boehm; M. Bourquin; J.G. Branson; J.D. Burger; C. Camps; M. Cerrada; C.C. Chang; Y.H. Chang; Hesheng Chen; M. Chen; M. L. Chen; M.Y. Chen; V. Commichau; E. Deffur; K. Deiters; M. Dhina; J. Fehlmann; H.S. Fesefeldt; D. Fong; W. Friebel; M. Fukushima; L. Garrido; K.Z. Guo; M. Hausammann
The strong interaction coupling constant αs has been measured with a new method, the planar triple energy correlation in the reaction e+e- → hadrons at center-of-mass energies ranging from 14 GeV to 46.78 GeV. A complete second-order perturbative QCD calculation was used. ΛMS = 110 ± 30 −55+70 MeV is found.
Nuclear Physics B - Proceedings Supplements | 1993
O. Adriani; S. P. Ahlen; G. Ambrosi; E. Babucci; G. Barbagli; A. Baschirotto; R. Battiston; A. Bay; G. Bencze; P. Béné; B. Bertucci; M. Biasini; G. M. Bilei; J. Boissevain; M. Bosetti; M. L. Brooks; J. Busenitz; W.J. Burger; C. Camps; M. Caria; G. Castellini; R. Castello; B. Checcucci; A. Chen; W.Y. Chen; T.E. Coan; V. Commichau; D. DiBitonto; S. Easo; P. Extermann
Abstract A report on the status of the construction of the L3 Silicon Microvertex Detector is presented here. The detector will consist of two double sided AC coupled silicon layers equipped with rφ and z readout with an expected intrinsic resolution of ≈ 6 μ m and ≈ 25 μ m respectively. A description of the detector with its mechanical support, alignment system and readout electronics is presented.
Physics Letters B | 1987
B. Adeva; H. Anderhub; S. Ansari; U. Becker; R. Becker-Szendy; J. Berdugo; A. Boehm; M. Bourquin; J. G. Branson; J.D. Burger; C. Camps; M. Cerrada; C.C. Chang; Y. H. Chang; H. S. Chen; M. Chen; M. L. Chen; M.Y. Chen; V. Commichau; E. Deffur; K. Deiters; M. Dhina; J. Fehlmann; H.S. Fesefeldt; D. G. Fong; W. Friebel; M. Fukushima; L. Garrido; K.Z. Guo; R.D. Han
We study the production of single γ, e and μ at high πt using the high energy data of the Mark-J detector at PETRA. We find good agreement with QED. We give mass limits of the SUSY particles γ, v, e and W studying the associated production of W and ẽ and radiative production of pairs of γ or v in three-body reactions.
Physics Letters B | 1986
B. Adeva; S. Ansari; U. Becker; R. Becker-Szendy; J. Berdugo; A. Boehm; J.G. Branson; J.D. Burger; M. Capell; M. Cerrada; C.C. Chang; Y.H. Chang; Hesheng Chen; M. Chen; M. L. Chen; M.Y. Chen; Y.K. Chi; E. Deffur; K. Deiters; M. Demarteau; M. Dhina; B.Z. Dong; P. Duinker; H.S. Fesefeldt; D. Fong; M. Fukushima; L. Garrido; R.D. Han; D. Harting; G. Herten
Abstract A study of τ-lepton production in the CMS energy region from 14 to 46.8 GeV at PETRA is reported. The cross section, the decay branching ratio into μν ν , and the electroweak parameters are determined with a total integrated luminosity of 115 pb −1 .
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1995
G. Ambrosi; M. Acciarri; O. Adriani; A. Baschirotto; R. Battiston; A. Bay; B. Bertucci; G. M. Bilei; M. Bosetti; M. L. Brooks; W.J. Burger; C. Camps; G. Castellini; R. Castello; B. Checcucci; T.E. Coan; V. Commichau; P. Extermann; A. Gabbanini; K. Hangarter; J. Kapustinsky; W.W. Kinnison; G. Landi; D. M. Lee; R. Leiste; W. Lohmann; G. B. Mills; H. Nowak; G. Passaleva; S. Pensotti
Abstract In 1993 the L3 detector at LEP has been equipped with a Silicon Microstrip Detector (SMD). In this paper we give a full description of the various components of the SMD readout and DAQ system.
