Initial results of NEXT-DEMO, a large-scale prototype of the NEXT-100 experiment
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NEXT-DEMO is a large-scale prototype of the NEXT-100 detector, an electroluminescent time projection chamber that will search for the neutrinoless double beta decay of 136XE using 100-150 kg of enriched xenon gas. NEXT-DEMO was built to prove the expected performance of NEXT-100, namely, energy resolution better than 1% FWHM at 2.5 MeV and event topological reconstruction. In this paper we describe the prototype and its initial results. A resolution of 1.75% FWHM at 511 keV (which extrapolates to 0.8% FWHM at 2.5 MeV) was obtained at 10 bar pressure using a gamma-ray calibration source. Also, a basic study of the event topology along the longitudinal coordinate is presented, proving that it is possible to identify the distinct dE/dx of electron tracks in high-pressure xenon using an electroluminescence TPC.© 2013 IOP Publishing Ltd and Sissa Medialab srl.
author list (cited authors)
Álvarez, V., Borges, F., Cárcel, S., Castel, J., Cebrián, S., Cervera, A., ... Yahlali, N.