Résumé du preprint DAPNIA-05-296
| DAPNIA-05-296 |
|---|
| A low background Micromegas detector for the CAST |
| P. Abbon, S. Andriamonje, S. Aune, D. Besin, S. Cazaux, P.Contrepois, N. Duportail, E. Ferrer Ribas, M. Gros, I.G. Irastorza, A. Giganon, I. Giomataris, M. Riallot, G.Zaffanela, G. Fanourakis, T. Geralis, K. Kousouris, K. Zachariadou, T. Dafni, T. Decker, R. Hill, M. Pivovaroff and R. Soufli, J. Morales |
A low background Micromegas detector has been operating
on the CAST experiment at CERN for the search of solar axions
during the first phase of the experiment (2002-2004). The detector
operated efficiently and achieved a very low level of background
rejection ($5\\times 10^{-5}$ counts keV$^{-1}$cm$^{-2}$s$^{-1}$)
thanks to its good spatial and energy resolution as well as the
low radioactivity materials used in the construction of the
detector. For the second phase of the experiment (2005-2007), the
detector will be upgraded by adding a shielding and including
focusing optics. These improvements should allow for a background
rejection better than two orders of magnitude. |
