Mainz 2012 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 63: Astroteilchenphysik

HK 63.4: Vortrag

Freitag, 23. März 2012, 14:45–15:00, RW 3

Studies on Liquid Xenon Low Energy Scattering for Dark Matter Applications — •Pierre Sissol, Bastian Beskers, Cyril Grignon, Uwe Oberlack, and Rainer Othegraven — Johannes Gutenberg Universität Mainz

The concept of a dual-phase Xenon time projection chamber realizes with XENON100 the currently most sensitive dark matter search experiment. Its successor XENON1T is already in development phase, and detectors at the 10 ton scale (e.g. DARWIN) are being envisioned. Background suppression and discrimination are driving forces in the design of these experiments. Currently, this is accomplished by fiducialization using position sensitivity and light/charge discrimination. Additional discrimination may be achieved by pulse-shape discrimination.
The Mainz group is setting up a small 3D position-sensitive two-phase Xenon-TPC to measure charge and scintillation yield at recoil energies of a few keV and to study the liquid Xenon scintillation pulse shape. We employ MC simulations to study low energy scattering of gamma-rays and neutrons to optimize the experimental setup. Here we discuss the planned experiments and identify the dominant systematic errors.