NEXT-DEMO: a prototype for the NEXT experiment

Abstract

NEXT is a high-pressure (10-15 bar) xenon Time Projection Chamber dedicated to neutrinoless double beta decay searches. NEXT-DEMO is a large prototype of the NEXT experiment, constructed to demonstrate the feasibility of the NEXT detector concept, in particular the capability of the TPC to achieve an optimal energy resolution at the Xe Qbb energy (2.458 MeV). It has been operating at IFIC, in Valencia, for one year and a half and a number of results has been achieved. Recently, the reflector panels of the prototype have been coated with a wavelength shifter (TPB), in order to improve light collection. We have obtained an energy resolution of 2.3% FWHM at 511 keV, using Na-22 radioactive sources, corresponding to 1% FWHM once extrapolated to Qbb.

Proceedings for the 14th International Workshop on Radiation and Imaging Detectors (iWoRID 2012), July 1-5, Figueira da Foz, Portugal

References in corpus (8)

• Double Beta Decay, Majorana Neutrinos, and Neutrino Mass
• Search for Neutrinoless Double-Beta Decay in ${}^{136}$Xe with EXO-200
• Fluorescence Efficiency and Visible Re-emission Spectrum of Tetraphenyl Butadiene Films at Extreme Ultraviolet Wavelengths
• NEXT-100 Technical Design Report (TDR). Executive Summary
• Recent Progress in Double Beta Decay
• Optical readout tracking detector concept using secondary scintillation from liquid argon generated by a thick gas electron multiplier
• Neutrinoless Double Beta-Decay
• NEXT, high-pressure xenon gas experiments for ultimate sensitivity to Majorana neutrinos