Speaker
Galan Lacarra Javier
(Instituto de Fisica Nuclear y Altas Energias - Facultad de Cienc)
Description
A low background Micromegas detector was operating at the sunrise side of the CAST (CERN Axion Solar Telescope) experiment during the first phase of the experiment (2002-2004). This detector, constructed of low radioactivity materials, operated efficiently and achieved a low background level of around 5x10-5 counts/keV/cm2/s in the 2-4 keV region. This performance was accomplished by exploiting the spatial and energy resolution of the detector as well as the time information contained in the pulse shape of the events. During the second phase of the experiment, the detector at the sunrise was replaced and upgraded by including a shielding. Moreover the old TPC covering the sunset side of the experiment was replaced by two new Micromegas detectors. These detectors belong to the newest generation of Micromegas detectors: 'bulk' and 'microbulk'. Performances and advantages will be presented.
Authors
Dr
Esther Ferrer Ribas
(DAPNIA, Saclay)
Galan Lacarra Javier
(Instituto de Fisica Nuclear y Altas Energias - Facultad de Cienc)
