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 Qββ 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 Qββ.
Journal of Instrumentation
- Pub Date:
- November 2012
- Physics - Instrumentation and Detectors;
- High Energy Physics - Experiment;
- High Energy Physics - Phenomenology
- Proceedings for the 14th International Workshop on Radiation and Imaging Detectors (iWoRID 2012), July 1-5, Figueira da Foz, Portugal