A Dual-phase Xenon TPC for Scintillation and Ionisation Yield Measurements in Liquid Xenon

Understand

A small-scale, two-phase (liquid/gas) xenon time projection chamber (Xurich II) was designed, constructed and is under operation at the University of Zurich.

• Its main purpose is to investigate the microphysics of particle interactions in liquid xenon at energies below 50 keV, which are relevant for rare event searches using xenon as target material.
• Here we describe in detail the detector, its associated infrastructure, and the signal identification algorithm developed for processing and analysing the data.
• We present the first characterisation of the new instrument with calibration data from an internal 83m-Kr source.