Commissioning of a dual-phase xenon TPC at Nikhef
arXiv:1602.01974 · doi:10.1016/j.nima.2016.09.052
Abstract
A dual-phase xenon time-projection chamber was built at Nikhef in Amsterdam as a direct dark matter detection R&D facility. In this paper, the setup is presented and the first results from a calibration with a Na gamma-ray source are presented. The results show an average light yield of (5.6 0.3) photoelectrons/keV (calculated to 122 keV and zero field) and an electron lifetime of (429 26) s. The best energy resolution is (5.8 0.2)% at an energy of 511 keV. This was achieved using a combination of the scintillation and the ionization signals. A photomultiplier tube gain calibration technique, based on the electroluminescence signals occurring from isolated electrons, is presented and its advantages and limitations are discussed.
14 pages, 17 figures
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