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T: Fachverband Teilchenphysik
T 32: Dunkle Materie 2
T 32.4: Talk
Monday, March 24, 2014, 17:30–17:45, P11
Electrostatic Field Calculations for a Dual Phase Noble Gas WIMP Detector — •Julien Wulf, Guido Drexlin, Ferenc Glück, Daniel Hilk, and Thomas Thümmler — KIT Center Elementary Particle and Astroparticle Physics (KCETA)
In the last years, dual phase noble gas detectors like XENON100 or LUX delivered today’s most accurate limits on WIMP-nucleon crosssections with σ < 10−45cm2. To push the sensitivity to O(10−48cm2), several international groups are working within a consortium on the technical design report for DARWIN (DARk matter WImp search with Noble liquids), a facility housing two multi-ton detectors combining both technologies from the Argon- and Xenon-based
experiments.
The detection principle of a dual phase noble gas detector allows an excellent background discrimination. In order to design this kind of detectors, it is indispensable to study and optimize the electrostatic properties of the detector geometry in advance. Therefore, the simulation software KEMField has been used, which has originally been developed for the KATRIN experiment. KEMField utilizes the Boundary Element Method, which is advantageous especially for simulating small scale wire structures within large volumes. For DARWIN a parallelized GPU/MPI version of KEMField has been used in order to decrease the computation time by a factor of 100.
This talk shows a comparison of KEMField against Finite Element based simulation software and discusses an electrostatic simulation of
an exact CAD-based DARWIN model. This work was supported by the BMBF under grant no. 05A11VK3 and by the Helmholtz Association.