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HK: Fachverband Physik der Hadronen und Kerne

HK 46: Poster

HK 46.85: Poster

Donnerstag, 20. März 2014, 16:00–18:00, HZ Poster

Construction of the XENON1T purification system and slow control — •Sergej Schneider, Ethan Brown, Christian Huhmann, Stephan Rosendahl, and Christian Weinheimer — Institut für Kernphysik, Universität Münster

A fundamental and still unanswered question in astrophysics is the nature of dark matter. A promising approach for a direct detection of a Weakly Interacting Massive Particle (WIMP) is the search for a recoil signal in a dual phase xenon time projection chamber. The XENON Dark Matter Project is currently upscaling from 62 kg detector to the ton scale detector XENON1T to reach sensitivity for a 100 GeV/c² particle with a cross section of σ = 2 · 10⁴⁷ cm². When aiming at such a high sensitivity it is crucial to provide extremely pure xenon as detector material in order to allow for a high light and charge collection. These signals are attenuated by trace electronegative impurities.

Electronegative impurities are being removed in the purification system of XENON1T by constantly circulating the xenon gas through a high temperature getter. This system is monitored and controlled by a slow control system in order to acquire data, send out alarms in case of dysfunctions and allow to operate relevant devices from a control panel. The construction of the XENON1T purification system and implementation of the slow control will be presented. This work is funded by BMBF.