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arXiv · 0706.1636

Background studies and shielding effects for the TPC detector of the CAST experiment

G. Luzón·B. Beltrán·J. M. Carmona·S. Cebrián·H. Gómez·I. G. Irastorza·J. Morales·A. Ortíz·A. Rodríguez·J. Ruz·J. A. Villar
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Abstract

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 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.

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G. Luzón, B. Beltrán, J. M. Carmona, S. Cebrián, H. Gómez, I. G. Irastorza, J. Morales, A. Ortíz, A. Rodríguez, J. Ruz, J. A. Villar. 2007-06-12. Background studies and shielding effects for the TPC detector of the CAST experiment. https://doi.org/10.1088/1367-2630%2F9%2F7%2F208

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