J. R. Carter
University of Cambridge
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Featured researches published by J. R. Carter.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1993
Phillip Allport; J. R. Batley; P. Capiluppi; A. A. Carter; J. R. Carter; S. J. De Jong; U.C. Dunwoody; V. Gibson; W. Glessing; P.R. Goldey; M. J. Goodrick; W. Gorn; R. Hammarström; G. Hanson; J. D. Hobbs; J. Hill; J. C. Hill; R. Humbert; F. R. Jacob; M. Jiminez; P. Kyberd; C. Leroy; X.C. Lou; A. Martin; J.-P. Martin; C. Moisan; C. J. Oram; T.W. Pritchard; O. Runolfsson; P. Seller
A silicon strip microvertex detector has been designed, constructed and commissioned in the OPAL experiment at the LEP electron-positron collider. The microstrip devices incorporate a new FoxFET biassing scheme developed together with Micron Semiconductor Ltd., UK. The devices digitise with a precision close to 5 μm and have an exceptionally high signal-to-noise ratio. The associated microelectronics were all custom made for the OPAL project. The detector began operation in 1991 and has since continued to be part of the OPAL experiment, performing to a very high standard and opening up new areas of physics studies.
European Physical Journal C | 1987
T. Åkesson; M. Albrow; S. Almehed; O. Benary; H. Bøggild; O. Botner; H. Breuker; A. A. Carter; J. R. Carter; Y. Choi; W. Cleland; S. Dagan; E. Dahl-Jensen; I. Dahl-Jensen; G. Damgaard; C. Fabjan; U. Goerlach; K.H. Hansen; V. Hedberg; G. Jarlskog; S. Katsanevas; N. J. Kjaer; R. Kroeger; K. Kulka; D. Lissauer; B. Lörstad; Athanasios Markou; N. A. McCubbin; U. Mjörnmark; R. Møller
AbstractIn a study ofpp collisions at
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1991
Phillip Allport; J. R. Carter; V. Gibson; M. J. Goodrick; J. C. Hill; S.G. Katvars; M.A. Bullough; N.M. Greenwood; A.D. Lucas; C.D. Wilburn; A.A. Carter; T.W. Pritchard; L. Nardini; P. Seller; S.L. Thomas
Nuclear Physics | 1986
T. Åkesson; M. Albrow; S. Almehed; Richard Batley; O. Benary; H. Bøggild; O. Botner; H. Breuker; V. Burkert; R. Carosi; A. A. Carter; J. R. Carter; P. Cecil; S. U. Chung; W. Cleland; D. J. A. Cockerill; S. Dagan; E. Dahl-Jensen; I. Dahl-Jensen; P. Dam; G. Damgaard; W.M. Evans; C. Fabjan; P. Frandsen; S. Frankel; W. Frati; M.D. Gibson; U. Goerlach; M. J. Goodrick; K.H. Hansen
\sqrt s = 63
Physics Letters B | 1981
K. Alpgard; C.N. Booth; K. Jon-And; F. Triantis; Daniel Bertrand; G. Ekspong; K. von Holt; R. Hospes; Y. Saarikko; P. Carlson; T.O. White; A. Odian; J.P. Fabre; M.N. Maggs; N. Yamdagni; Anthony Weidberg; K.A. French; D. Johnson; M. Rosenberg; M. Gijsen; T. Muller; L. Burow; D.J. Munday; R.E.S. Berglund; G. Weber; J. R. Carter; J. Gaudaen; B. Eckart; C. Buffam; R. Meinke
Journal of Instrumentation | 2008
D. Attree; P. Werneke; F. Corbaz; J. Mistry; A. Rovani; K. Einsweiler; J.P. Bizzel; C. Menot; T. J. Jones; Eric Anderssen; Gibson; P. Barclay; P. Bonneau; S W Lindsay; M. Parodi; R. L. Bates; R. B. Nickerson; H. Pernegger; M. Tyndel; S. Butterworth; V. Sopko; J. Bendotti; E. Perrin; M Doubrava; N. P. Hessey; A. Nichols; P.E. Nordahl; J. Tarrant; I Gousakov; D. Muskett
GeV with more than 29 GeV total transverse energy emitted into 1.8 units of rapidity in the central region, we have extracted a sample of 4-jet events and compared it with models of the two sources of 4-jet production: double bremsstrahlung and double parton scattering. The data cannot be described by bremsstrahlung alone, and we extract the fraction of 4-jet events attributed to double parton scattering for various definitions of the 4-jet sample. We determine the double parton scattering/2-jet yield ratio, and this leads to a determination of the proton radius. We discuss the implications of our observations for the general understanding of high-ΣET events.
Physics Letters B | 1981
K. Alpgard; R.E. Ansorge; B. Åsman; S. Berglund; K. Berkelman; D. Bertrand; K. Böckmann; C.N. Booth; C. Buffam; L. Burow; P. Carlson; J. R. Carter; J.L. Chevalley; B. Eckart; G. Ekspong; J.P. Fabre; K.A. French; J. Gauden; M. Gijsen; K. von Holt; R. Hospes; D. Johnson; K. Jon-And; Th. Kokott; R. Mackenzie; M.N. Maggs; R. Meinke; T. Muller; H. Mulkens; D.J. Munday
Abstract A method has been developed for biassing the strips of a silicon microstrip detector with a tunable dynamic resistance. This allows the strip potentials to be tied to a fixed voltage, virtually independent of the strip leakage currents, whilst requiring no processing steps additional to those needed for a standard capacitively coupled detector. Results are presented for full sized detectors (3.3 cm × 6.0 cm) both measured on a probe station and equipped with VLSI readout (MX3) chips. Assemblies are currently undergoing beam tests at CERN with indications of very promising performance.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2002
T. Kondo; R. Apsimon; G.A. Beck; P. Bell; Richard Brenner; P. A. Bruckman de Renstrom; A. A. Carter; J. R. Carter; D. G. Charlton; W. Dabrowski; O. Dorholt; T. Ekelof; L. Eklund; M.D. Gibson; S. Gadomski; A. A. Grillo; J. Grosse-Knetter; C. Haber; K. Hara; J. C. Hill; Y. Ikegami; Y. Iwata; Lars Johansen; T. Kohriki; A. Macpherson; S. McMahon; G. F. Moorhead; J. Morin; J. Morris; M.C. Morrissey
We present results from a study of centrally produced mesons in 3 × 106 events with two small-angle protons at the CERN Intersecting Storage Rings. A high-statistics sample of exclusive pp → ppπ+π− events at √s = 63 GeV has been obtained, where the reaction mechanism is dominated by double pomeron exchange. Scalar or tensor glueballs may be produced by this process. The π+π− mass spectrum has a distinctive structure, and analysis shows that the data are dominantly S-wave up to 1600 MeV. The behaviour of the D-wave provides evidence for a 2++ resonance (M = 1480 ± 50 MeV, Γ = 150 ± 50 MeV) in addition to the f(1270). We also show data on exclusive K+K−, pp, and π+π−π+π− production, and on the analogous reaction αα → ααπ+π− at √s = 126 GeV. Flavour independence is suggested by the observation of approximately equal numbers of K+K− and π+π− pairs for mass above 1 GeV. The mass spectra are also apparently independent of √s (45, 63, 126 GeV) and incident particle type (p, α).
Nuclear Physics | 1980
D. Brick; A. M. Shapiro; M. Widgoff; Rainer E Ansorge; J. R. Carter; W.W. Neale; J.G. Rushbrooke; D. R. Ward; B. M. Whyman; R.A. Burnstein; H. A. Rubin; J.W. Cooper; R.L. Plumer; R.D. Sard; J. Tortora; E.D. Alyea; L. Bachman; C.Y. Chien; J. Brau; E. Hafen; D. Hochman; R. I. Hulsizer; V. Kistiakowsky; A. Levy; P. Lutz; A. Napier; I. A. Pless; J.P. Silverman; P. C. Trepagnier; R. K. Yamamoto
Abstract First results from the UA5 detector on charged particle production at √s = 540 GeV in the pseudorapidity range ∣ν∣
Physics Letters B | 1983
T. Åkesson; M. Albrow; S. Almehed; R. Batley; O. Benary; H. Bøggild; O. Botner; H. Breuker; H. Brody; V. Burkert; A. A. Carter; J. R. Carter; P. Cecil; S. U. Chung; W. Cleland; D. J. A. Cockerill; S. Dagan; E. Dahl-Jensen; I. Dahl-Jensen; Piet Van Dam; G. Damgaard; S. Eidelman; W.M. Evans; C. Fabjan; P. Frandsen; S. Frankel; W. Frati; M.D. Gibson; U. Goerlach; H. A. Gordon
This paper describes the evaporative system used to cool the silicon detector structures of the inner detector sub-detectors of the ATLAS experiment at the CERN Large Hadron Collider. The motivation for an evaporative system, its design and construction are discussed. In detail the particular requirements of the ATLAS inner detector, technical choices and the qualification and manufacture of final components are addressed. Finally results of initial operational tests are reported. Although the entire system described, the paper focuses on the on-detector aspects. Details of the evaporative cooling plant will be discussed elsewhere.
