Dresden 2013 – wissenschaftliches Programm
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AGjDPG: Arbeitsgruppe junge DPG
AGjDPG 6: Dark matter physics - an insight into various experiments (with T)
AGjDPG 6.3: Hauptvortrag
Donnerstag, 7. März 2013, 17:45–18:15, HSZ-103
The XENON dark matter project — •Ethan Brown — Institut für Kernphysik, Universität Münster
A large amount of evidence supports the theory that 25% of the universe is composed of cold dark matter. The XENON project has conducted several experiments using a liquid xenon target in a dual phase time projection chamber (TPC) in an attempt to detect dark matter in the form of Weakly Interacting Massive Particles (WIMPs). The XENON100 experiment has conducted a dark matter search based on 225 live days of data without evidence for a dark matter signal, placing the most stringent limits on the WIMP-nucleon cross section, of σ < 2.0 × 10−45 cm2.
The next phase of the XENON project aims to increase the sensitivity by two orders of magnitude by scaling up the existing 100 kg detector to the ton scale. In order to achieve the sensitivity goal, detector performance must be similar to that of XENON100 while scaling up the detector size. Additionally, backgrounds must be substantially reduced by special material selection and purification techniques that are currently being developed.
The XENON100 results will be presented, along with an overview of the XENON1T experiment, including results from the development of several subsystems.
Different aspects of this project are funded by BMBF and DFG.