R
R.J. Walker
Researcher at Imperial College London
Publications - 7
Citations - 425
R.J. Walker is an academic researcher from Imperial College London. The author has contributed to research in topics: ZEPLIN-III & Dark matter. The author has an hindex of 7, co-authored 7 publications receiving 402 citations.
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Journal ArticleDOI
Results from the first science run of the ZEPLIN-III dark matter search experiment
V. N. Lebedenko,Henrique Araujo,E. J. Barnes,A. Bewick,R. J. Cashmore,V. Chepel,A. Currie,D. C. R. Davidge,J. V. Dawson,T. Durkin,B. N. Edwards,C. Ghag,M. Horn,A. S. Howard,A. J. Hughes,W. G. Jones,Manasvita Joshi,G. E. Kalmus,A. G. Kovalenko,A. Lindote,I. Liubarsky,M.I. Lopes,R. Lüscher,P. Majewski,A. St. J. Murphy,F. Neves,J. Pinto da Cunha,R. M. Preece,J. J. Quenby,P.R. Scovell,C. Silva,V. N. Solovov,N. J. T. Smith,P.F. Smith,V.N. Stekhanov,T. J. Sumner,C. Thorne,R.J. Walker +37 more
TL;DR: The ZEPLIN-III experiment in the Palmer Underground Laboratory at Boulby uses a 12 kg two-phase xenon time-projection chamber to search for the weakly interacting massive particles (WIMPs) that may account for the dark matter of our Galaxy as discussed by the authors.
Journal ArticleDOI
Limits on the spin-dependent WIMP-nucleon cross sections from the first science run of the ZEPLIN-III experiment.
V. N. Lebedenko,Henrique Araujo,E. J. Barnes,A. Bewick,R. J. Cashmore,V. Chepel,A. Currie,D. C. R. Davidge,J. V. Dawson,T. Durkin,B. N. Edwards,C. Ghag,M. Horn,A. S. Howard,A. J. Hughes,W. G. Jones,M. Joshi,G. E. Kalmus,A. G. Kovalenko,A. Lindote,I. Liubarsky,M.I. Lopes,R. Lüscher,K. Lyons,P. Majewski,A. St. J. Murphy,F. Neves,J. Pinto da Cunha,R. M. Preece,J. J. Quenby,P.R. Scovell,C. Silva,V. N. Solovov,N. J. T. Smith,P.F. Smith,V.N. Stekhanov,T. J. Sumner,C. Thorne,R.J. Walker +38 more
TL;DR: Analysis of data from the first science run of ZEPLIN-III, a two-phase xenon experiment searching for galactic dark matter weakly interacting massive particles based at the Boulby mine, indicates that the sensitivity of xenon targets to the spin-dependent WIMP-proton interaction could be much lower than implied by previous calculations.
Journal ArticleDOI
Measurement of single electron emission in two-phase xenon
B. N. Edwards,B. N. Edwards,Henrique Araujo,Henrique Araujo,V. Chepel,David B. Cline,T. Durkin,J. Gao,C. Ghag,E.V. Korolkova,V. N. Lebedenko,A. Lindote,M.I. Lopes,R. Lüscher,A. St. J. Murphy,F. Neves,W. Ooi,J. Pinto da Cunha,R. M. Preece,G. Salinas,C. Silva,V. N. Solovov,N. J. T. Smith,P.F. Smith,P.F. Smith,T. J. Sumner,C. Thorne,R.J. Walker,Hongwei Wang,J. T. White,F.L.H. Wolfs +30 more
TL;DR: In this article, the first measurements of the electroluminescence response to the emission of single electrons in a two-phase noble gas detector were presented, which may have implications for the design and operation of future large-scale two phase systems.
Journal ArticleDOI
Limits on inelastic dark matter from ZEPLIN-III
D.Yu. Akimov,Henrique Araujo,E. J. Barnes,V. A. Belov,A. Bewick,A. A. Burenkov,R. J. Cashmore,V. Chepel,A. Currie,D. C. R. Davidge,J. V. Dawson,T. Durkin,B. N. Edwards,C. Ghag,A. Hollingsworth,M. Horn,A. S. Howard,A.J. Hughes,W. G. Jones,G. E. Kalmus,A. S. Kobyakin,A. G. Kovalenko,V. N. Lebedenko,A. Lindote,A. Lindote,I. Liubarsky,M.I. Lopes,R. Lüscher,K. Lyons,P. Majewski,A. St. J. Murphy,F. Neves,F. Neves,Sean Paling,J. Pinto da Cunha,R. M. Preece,J. J. Quenby,L. Reichhart,P.R. Scovell,Catarina Silva,V. N. Solovov,N. J. T. Smith,P.F. Smith,V.N. Stekhanov,T. J. Sumner,C. Thorne,L. de Viveiros,R.J. Walker +47 more
TL;DR: In this article, the WIMP-nucleon cross section for inelastic dark matter from a reanalysis of the 2008 run of ZEPLIN-III was presented.
Journal ArticleDOI
The ZEPLIN-III Anti-Coincidence Veto Detector
D.Yu. Akimov,Henrique Araujo,E. J. Barnes,V. A. Belov,A. A. Burenkov,V. Chepel,A. Currie,B. N. Edwards,V. Francis,C. Ghag,A. Hollingsworth,M. Horn,G. E. Kalmus,A. S. Kobyakin,A. G. Kovalenko,V. N. Lebedenko,A. Lindote,A. Lindote,M.I. Lopes,R. Lüscher,K. Lyons,P. Majewski,A. St. J. Murphy,F. Neves,F. Neves,Sean Paling,J. Pinto da Cunha,R. M. Preece,J. J. Quenby,L. Reichhart,P.R. Scovell,V. N. Solovov,N. J. T. Smith,P.F. Smith,V.N. Stekhanov,T. J. Sumner,R. Taylor,C. Thorne,R.J. Walker +38 more
TL;DR: In this paper, an anti-coincidence veto detector was proposed to complement the ZEPLIN-III direct dark matter search instrument, which is capable of rejecting over 65% of coincident nuclear recoil events from neutron background in the energy range of interest.