Münster 2017 – scientific programme

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T: Fachverband Teilchenphysik

T 12: Neutrinophysik 2 (Doppelbetazerfall)

T 12.5: Talk

Monday, March 27, 2017, 17:50–18:05, VSH 118

Investigations on electron drift in the EXO-200 TPC — •Gerrit Wrede, Sebastian Schmidt, Gisela Anton, Jürgen Hößl, and Thilo Michel — Erlangen Centre for Astroparticle Physics (ECAP), Friedrich-Alexander Universität Erlangen-Nürnberg, Erwin-Rommel-Str. 1, 91058 Erlangen

The EXO-200 experiment searches for the neutrinoless double beata decay of Xe-136 with a cylindrical LXe TPC.

The double-sided, single-phase TPC provides the position (X,Y,Z) of events and the deposited energy in LXe by simultaneously detecting the scintillation light and the amount of released charge.

For charge collection, electrons drift in the electric field towards the end plates on each side of detector, where they induce currents in a first plane of wires and are collected by a second plane of wires. In order to improve the accuracy of the position reconstruction an analysis of drift field inhomogeneities at the side wall of the cylindrical TPC was carried out.

In this contribution we present the results of our investigations on the non-uniformities of the electric field close to the field-shaping rings and our work on the charge drift simulation to account for these non-uniformities to eventually increase the fiducial volume in the data analysis.