ar X iv : 0 70 6 . 16 36 v 1 [ as tr o - ph ] 1 2 Ju n 20 07 Background studies and shielding effects for the TPC detector of the CAST experiment

نویسندگان

  • J Ruz
  • J A Villar
چکیده

Sunset solar axions traversing the intense magnetic field of the CERN Axion Solar Telescope (CAST) experiment may be detected in a Time Projection Chamber (TPC) detector, as point-like X-rays signals. These signals could be masked, however, by the inhomogeneous background of materials in the experimental site. A detailed analysis, based on the detector characteristics, the background radiation at the CAST site, simulations and experimental results, has allowed us to design a shielding which reduces the background level by a factor of∼4 compared to the detector without shielding, depending on its position, in the energy range between 1 and 10 keV. Moreover, this shielding has improved the homogeneity of background measured by the TPC. PACS numbers: 29.40.Cs, 95.35.+d, 07.85.Nc, 07.05.Fb, 07.05.Kf ‡ Present address: Department of Physics, Queens University, Kingston, Ontario, Canada CAST-TPC background studies and shielding effects 2

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تاریخ انتشار 2009