Resumen:
|
The aim of the present work is the study of the energy calibration with external radioactive sources for the Argon Dark Matter (ArDM) experiment, which consists of a double-phase argon detector for direct dark matter searches. This experiment, with a ton-scale sensitive volume, has been conceived to detect nuclear recoils produced by dark matter particles scattering off target nuclei. The advantage of having a double-phase detection technique lies on the fact that both scintillation light and ionization charge can be measured, providing a powerful discrimination method between nuclear recoils and background events. In this context, the calibration with external gamma sources is necessary in order to establish the energy scale, monitoring at the same time the detector stability. In the introduction we briefly present the different experimental evidences of dark matter and the requirements that a good particle candidate should fulfill according to the astrophysical observations.
Moreover, we will introduce the supersymmetry, the extension of the Standard Model of particles which provides one WIMP candidate called neutralino. Throughout the following sections, special attention will be dedicated to the different techniques used for dark matter detection, pointing out the ArDM detector concept and technology. Finally, the simulation software and the results of the energy calibration studies will be presented.
|