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HK: Fachverband Physik der Hadronen und Kerne

HK 35: Astroparticle Physics I

HK 35.2: Gruppenbericht

Mittwoch, 16. März 2016, 14:30–15:00, S1/01 A02

Recent Edelweiss WIMP search results and perspectives — •Valentin Kozlov for the EDELWEISS collaboration — Karlsruher Institut für Technologie, Institut für Kernphysik, Postfach 3640, 76021 Karlsruhe

EDELWEISS collaboration performs direct dark matter search by means of Germanium low-temperature detectors. A 20-kg array of advanced high-purity detectors is operated at 18 mK in the low-radioactivity environment of the Modane underground laboratory (LSM, France). The current phase of the experiment shows improved resolution and rejection performance relative to the results of the previous phase. A first low WIMP mass analysis of data acquired in a long-term campaign will be presented. To further explore the parameter space for low mass WIMPs (down to ∼1 GeV), the current R&D program concentrates on voltage-assisted heat amplification technique (so-called Neganov-Luke mode). Significant improvements in sensitivity can be realized with a moderate exposure of 350 kg.d within the next 2 years. Beyond 2017, the already existing cooperation with SuperCDMS should lead to a common experimental infrastructure in SNOLAB. Current R&D activities, sensitivity projections and the project towards the SNOLAB cryogenic facility will be discussed as well.