The EDELWEISS-II experiment is aimed at direct search for nonbarion cold dark matter. The important problem of the experiment is a decrease in the 222Rn background and its daughter products without which it is impossible to achieve a record sensitivity to the scattering cross section of dark matter particles. A highly sensitive radon detector has been developed by means of which the facility shield is optimized and the total gamma-background is halved. The detector is used in the EDELWEISS-II facility for continuous monitoring of the radon content in the process of data sampling that plays the key role for correct data interpretation.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 6, pp. 67‒70, June, 2010.
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Yakushev, E.A., Lubashevskii, A.V. Radon-induced background and methods of its elimination in the EDELWEISS-II experiment. Russ Phys J 53, 616–619 (2010). https://doi.org/10.1007/s11182-010-9462-6
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DOI: https://doi.org/10.1007/s11182-010-9462-6