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The XENON Collaboration is presently operating the XENON10 0 dual-phase time projection chamber (TPC) at the LNGS underground laboratory in Italy to search for Weakly Interacting Massive Particles (WIMPs). The detector contains 161 kg of li quid xenon of which 62 kg is the WIMP target mass and the rest is used for shielding and acti ve veto. The TPC capability of three dimensional vertex reconstruction and the combinati o of scintillation and ionisation signals allow for volume fiducialization and discrimination betwee n lectronic and nuclear recoils. In 2011, results based on 100.9 live days set the strongest limi t on WIMP interactions at that time. Since then, new results were released in July 2012, with more than one calendar year of data, a lower krypton-related background, a lower trigger thresho ld and a longer electron lifetime. Based on a blind analysis of 224.6 live days × 34 kg exposure, no evidence of dark matter interaction was observed. The new results supersede the previous limit, excluding at 90% confidence level spin-independent WIMP-nucleon cross sections as low as 2 × 10−45 cm2 at 55 GeV/c2 WIMP mass. The next phase of the programme will be accomplished wi th the XENON1T detector in construction at LNGS. The new detector will employ 2.4 ton s of liquid xenon and will be placed in a water tank for further background reduction. The goal of XENON1T is to achieve a spin-independent cross section sensitivity of ∼ 2×10−47 cm2 at a WIMP mass of 50 GeV/c 2. I report on results from the operating XENON100 detector and d escribe the upcoming XENON1T experiment.

The XENON Dark Matter programme: from XENON100 to XENON1T