Hamburg 2016 – scientific programme

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T: Fachverband Teilchenphysik

T 39: Suche nach dunkler Materie II

T 39.6: Talk

Monday, February 29, 2016, 18:05–18:20, VMP9 SR 28

Geant4 simulations of the Münster dual phase xenon TPC — •Lutz Althüser — IKP, Westfälische Wilhelms-Universität Münster

The XENON Dark Matter Project uses the concept of a dual phase xenon time projection chamber (TPC) for a direct detection of weakly interacting massive particles (WIMPs). In the current operating step, XENON1T, the sensitivity of the detector will be increased by two orders of magnitude compared to its predecessor XENON100.

In order to investigate and test new systems for this experiment, as well as to do further studies, a small dual phase xenon TPC (height: 17 cm, diameter: 8 cm) with a light readout by 14 photomultiplier tubes (PMTs) was built at Muenster. For calibration of such a TPC regarding its light yield (LY) and light collection efficiency (LCE), radioactive sources can be placed near or inside the detector. The penetration of these sources depends on the inner volume of the detector, due to the self shielding effect of xenon, and on the used materials. The suitability of available radioactive sources can be determined by a Geant4 simulation package of the Münster TPC, which was used to test different calibration scenarios. This includes an internal low energy calibration with ^83mKr.

Within this talk an introduction to the Geant4 Münster package and the simulation of different calibration possibilities of the Münster TPC is shown.