Low X-ray background measurements at the Underground Canfranc Laboratory

10 Jun 2011, 09:30


Dr Javier Galan (University of Zaragoza)


Micromegas detectors, thanks to the good spatial and temporal discrimination capabilities, are good candidates for rare event search experiments. Recent X-ray background levels achieved by these detectors in the CAST experiment have motivated further studies in the nature of the background levels achieved. In particular, different shielding configurations have been tested at the Canfranc Underground Laboratory, using a microbulk type detector which was previously running at the CAST experiment. The first results underground show that this Micromegas technology, which is made of low radiactive materials, is able to reach background levels up to 2*10^{-7} keV^{-1} s^{-1} cm^{-2} with a proper shielding. Moreover, the experimental background measured are complemented with Geant4 simulations which allow to understand the origin of the background, and to optimize future shielding set-ups.

Primary author

Dr Javier Galan (University of Zaragoza)

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