Author/Authors :
Andriamonje، نويسنده , , Samuel and Aune، نويسنده , , Stephan and Brنuninger، نويسنده , , Heinrich and Dafni، نويسنده , , Theopisti and Dogan، نويسنده , , Berkol and Fanourakis، نويسنده , , George and Ferrer Ribas، نويسنده , , Esther and Galan، نويسنده , , Javier and Geralis، نويسنده , , Theodoros and Giganon، نويسنده , , Arnaud and Giomataris، نويسنده , , Ioannis and Irastorza، نويسنده , , Igor ، نويسنده ,
Abstract :
A low background Micromegas detector has been operating on the Cern Axion Solar Telescope (CAST) experiment at CERN for the search of solar axions during the first phase of the experiment. The detector operated efficiently and achieved a very low level of background rejection ( 5 × 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, the detector is being upgraded by adding a shielding and including focusing optics. These improvements should allow for a background rejection better than two orders of magnitude. The preliminary results of the first tests in the laboratory and in the PANTER X-ray test facility will be shown.
Keywords :
X-ray detector , Micromegas , axion , Dark matter , CAST experiment
