Abstract

The ArDM is a ton-scale double phase detector for the direct search of the Weakly Interacting Massive Particle (WIMPs) as Dark Matter candidates. The detector is based on a liquid Argon (LAr) target. The present goal is to assemble, fully characterize the detector on the surface and then operate it at an underground facility. The scintillation light and ionization charge produced by recoiling nuclei in WIMP-Ar collision can be measured independently. The discrimination of the WIMP induced nuclear recoils from the electron/gamma background is done using the pulse discrimination technique and the ratio between the produced light and charge. The experiment and the last results from the detector commissioning are presented. ©2010 American Institute of Physics