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arxiv 1211.4838 v4 pith:47S5KELM submitted 2012-11-20 physics.ins-det

Initial results of NEXT-DEMO, a large-scale prototype of the NEXT-100 experiment

NEXT Collaboration: V. \'Alvarez , F. I. G. M. Borges , S. C\'arcel , J. Castel , S. Cebri\'an , A. Cervera , C. A. N. Conde , T. Dafni
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T. H. V. T. Dias J. D\'iaz M. Egorov R. Esteve P. Evtoukhovitch L. M. P. Fernandes P. Ferrario A. L. Ferreira E. D. C. Freitas V. M. Gehman A. Gil A. Goldschmidt H. G\'omez J. J. G\'omez-Cadenas D. Gonz\'alez-D\'iaz R. M. Guti\'errez J. Hauptman J. A. Hernando Morata D. C. Herrera F. J. Iguaz I. G. Irastorza M. A. Jinete L. Labarga A. Laing I. Liubarsky J. A. M. Lopes D. Lorca M. Losada G. Luz\'on A. Mar\'i J. Mart\'in-Albo A. Mart\'inez T. Miller A. Moiseenko F. Monrabal C. M. B. Monteiro F. J. Mora L. M. Moutinho J. Mu\~noz Vidal H. Natal da Luz G. Navarro M. Nebot-Guinot D. Nygren C. A. B. Oliveira R. Palma J. P\'erez J. L. P\'erez Aparicio J. Renner L. Ripoll A. Rodr\'iguez J. Rodr\'iguez F. P. Santos J. M. F. dos Santos L. Segui L. Serra D. Shuman A. Sim\'on C. Sofka M. Sorel J. F. Toledo A. Tom\'as J. Torrent Z. Tsamalaidze D. V\'azquez J. F. C. A. Veloso J. A. Villar R. Webb J. T White N. Yahlali
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classification physics.ins-det
keywords fwhmnext-100next-demoprototypeeventinitiallarge-scaleresolution
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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 Xe-136 using 100 to 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.

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  1. Electroluminescence Yield Measurements in Xenon Gas with the NEXT-DEMO++ Detector

    physics.ins-det 2026-04 unverdicted novelty 5.0

    Electroluminescence yield measurements in xenon reveal a modest 5% change in the slope of the reduced yield Y/p above 5 bar pressure.