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The NAIAD experiment for WIMP searches at Boulby mine and recent results |
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| Authors: | B. Ahmed, G. J. Alner, H. Araujo, J. C. Barton, A. Bewick, M. J. Carson, D. Davidge, J. V. Dawson, T. Gamble, S. P. Hart, R. Hollingworth, A. S. Howard, W. G. Jones, M. K. Joshi, V. A. Kudryavtsev, T. B. Lawson, V. Lebedenko, M. J. Lehner, J. D. Lewin, P. K. Lightfoot, I. Liubarsky, R. Lü scher, J. E. McMillan, B. Morgan, G. Nicklin, S. M. Paling, R. M. Preece, J. J. Quenby, J. W. Roberts, M. Robinson, N. J. T. Smith, P. F. Smith, N. J. C. Spooner, T. J. Sumner,D. R. Tovey |
| Affiliation: | a Blackett Laboratory, Imperial College of Science, Technology and Medicine, London SW7 2BZ, UK b Particle Physics Department, Rutherford Appleton Laboratory, Chilton, Oxon OX11 0QX, UK c Department of Physics, Queen Mary, University of London, London E1 4NS, UK d Department of Physics and Astronomy, University of Sheffield, Hicks Building, Hounsfield Road, Sheffield S3 7RH, UK |
| Abstract: | The NAIAD experiment (NaI Advanced Detector) for weakly interacting massive particle (WIMP) dark matter searches at Boulby mine (UK) is described. The detector consists of an array of encapsulated and unencapsulated NaI(Tl) crystals with high light yield. Six crystals are collecting data at present. Data accumulated by four of them (10.6 kg × year exposure) have been used to set upper limits on the WIMP–nucleon spin-independent and WIMP–proton spin-dependent cross-sections. Pulse shape analysis has been applied to discriminate between nuclear recoils, as may be caused by WIMP interactions, and electron recoils due to gamma background. Various calibrations of crystals are presented. |
| Keywords: | Scintillation detectors Inorganic crystals Dark matter WIMP Pulse shape analysis |
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