18-22 February 2019
Vienna University of Technology
Europe/Vienna timezone

Instrumentation concepts for Neganov-Luke assisted mK-temperature Germanium detectors in dark matter search

Not scheduled
15m
Vienna University of Technology

Vienna University of Technology

Gusshausstraße 27-29, 1040 Wien
Board: 48
Poster Dark matter and other low-background experiments Poster Session A

Speaker

Dr Bernhard Siebenborn (Karlsruhe Institute of Technology (KIT))

Description

In direct searches for dark matter, the signature is a recoiling nucleus being hit by a massive dark matter particle, a so-called WIMP. A viable technology to search for such recoil signatures are detector arrays of Ge mono-crystals operated at a few mK temperature and equipped with electrodes and thermal sensors. Applying a small (few V/cm) external field, a simultaneous measurement of ionization and heat signals allows efficient discrimination of nuclear (signal) against electron recoils (background). Applying a larger bias leads to a so-called Neganov-Luke assisted amplification of the heat signal, lowering the effective threshold and thus opening a search for low mass WIMPs.
The electronics and DAQ system for such a cryogenic low-threshold setup will be presented and discussed, with special emphasis on the realisation in the EDELWEISS experiment as well as in currently ongoing R&D projects.

Primary author

Dr Bernhard Siebenborn (Karlsruhe Institute of Technology (KIT))

Presentation Materials