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 measured. 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 technology, which is made of low radiative materials, is able to reach background levels up to 2×10−7keV−1s−1cm−2 with a proper shielding. Moreover, the experimental background measurements are complemented with Geant4 simulations which allow to understand the origin of the background, and to optimize future shielding set-ups.
@article{arxiv.1110.2608,
title = {Low X-ray bakground measurements at the Underground Canfranc Laboratory},
author = {J. Galan and S. Aune and T. Dafni and G. Fanourakis and E. Ferrer-Ribas and J. A. Garcia and A. Gardikiotis and T. Geralis and I. Giomataris and H. Gomez and J. G. Garza and D. C. Herrera and F. J. Iguaz and I. G. Irastorza and G. Luzon and T. Papaevangelou and A. Rodriguez and J. Ruz and L. Segui and A. Tomas and T. Vafeiadis and S. C. Yildiz},
journal= {arXiv preprint arXiv:1110.2608},
year = {2015}
}
Comments
Proceedings of the 3rd International conference on Directional Detection of Dark Matter (CYGNUS 2011), Aussois, France, 8-10 June 2011