G. Davies
Imperial College London
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Featured researches published by G. Davies.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1992
A. Braem; A. Gonidc; D. Schinzel; W. Seidl; E. Clayton; G. Davies; G. Hall; R. Payne; S. Roe; C. Seez; J. Striebig; T. Virdee; D. J. A. Cockerill
Abstract The UV scintillation light in liquid xenon has been observed using silicon drift photodiodes. Measurements were carried out in a rectangular light cell of dimentions 7.4 × 7.4 × 60 cm3 using 5 GeV electrons. The photodiodes and the preamplifiers were immersed in the liquid. A high quantum efficiency for 175 nm UV light has been measured. The scintillation light yield is found to be (1.5 ± 0.6) × 104 photons per MeV of energy deposited in liquid xenon. A light attenuation lenght of ≈ 40 cm has been measured.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1998
E. Auffray; P. Baillon; D. Barney; G Bassompierre; Ya Benhammou; A Blick; P. Bloch; P Bonamy; J. Bourotte; L Buiron; F. Cavallari; R. Chipaux; D. J. A. Cockerill; I. Dafinei; G. Davies; P. Depasse; K. Deiters; M Diemoz; L. Dobrzynski; S Donskov; H El Mamouni; C Ercoli; J. L. Faure; M. Felcini; F Gautheron; M Geleoc; A. Givernaud; S. Gninenko; N. Godinovic; D.J Graham
Tests of lead tungstate crystal matrices carried out in high-energy electron beams in 1996, using new crystals, new APDs and an improved test set-up, confirm that an energy resolution of better than 0.6% at 100 GeV can be obtained when the longitudinal uniformity of the struck crystal is adequate. Light loss measurements under low dose irradiation are reported. It is shown that there is no loss of energy resolution after irradiation and that the calibration change due to light loss can be tracked with a precision monitoring system. Finally, successful tests with a preshower device, equipped with silicon strip detector readout, are described.
Physics Reports | 1998
P.F. Smith; N.J.T. Smith; J.D. Lewin; G.J. Homer; G. J. Alner; G. Arnison; J. J. Quenby; T. J. Sumner; A. Bewick; Tarig Ali; B. Ahmed; A.S. Howard; D. Davidge; M. Joshi; W. G. Jones; G. Davies; I. Liubarsky; R.A.D Smith; N.J.C. Spooner; J.W. Roberts; D. R. Tovey; M J Lehner; J.E. McMillan; C.D. Peak; V.A Kudryatsev; Jerome C. Barton
Abstract The current status is summarised of dark matter searches at the UK Boulby Mine based on pulse shape discrimination in NaI, together with further plans for international collaboration on detectors based on nuclear recoil discrimination in liquid and gaseous xenon.
