000056652 001__ 56652 000056652 005__ 20200221144311.0 000056652 0247_ $$2doi$$a10.1016/j.nuclphysbps.2015.09.279 000056652 0248_ $$2sideral$$a95705 000056652 037__ $$aART-2016-95705 000056652 041__ $$aeng 000056652 100__ $$aGomez-Cadenas, J.J. 000056652 245__ $$aThe NEXT experiment 000056652 260__ $$c2016 000056652 5060_ $$aAccess copy available to the general public$$fUnrestricted 000056652 5203_ $$aNEXT (Neutrino Experiment with a Xenon TPC) is an experiment to search neutrinoless double beta decay processes (ßß0¿ßß0¿). The isotope chosen by NEXT is 136Xe. The NEXT technology is based in the use of time projection chambers operating at a typical pressure of 15 bar and using electroluminescence to amplify the signal (HPXe). The main advantages of the experimental technique are: a) excellent energy resolution; b) the ability to reconstruct the trajectory of the two electrons emitted in the decays, a unique feature of the HPXe which further contributes to the suppression of backgrounds; c) scalability to large masses; and d) the possibility to reduce the background to negligible levels thanks to the barium tagging technology (BaTa). The NEXT roadmap was designed in four stages: i) Demonstration of the HPXe technology with prototypes deploying a mass of natural xenon in the range of 1 kg; ii) Characterisation of the backgrounds to the ßß0¿ßß0¿ signal and measurement of the ßß2¿ßß2¿ signal with the NEW detector, deploying 10 kg of enriched xenon and operating at the LSC; iii) Search for ßß0¿ßß0¿ decays with the NEXT-100 detector, which deploys 100 kg of enriched xenon; iv) Search for ßß0¿ßß0¿ decays with the BEXT detector, which will deploy masses in the range of the ton and will introduce two additional handles, only possible in a HPXe: a) A magnetic field, capable of further enhancing the topological signal of NEXT; and b) barium-tagging (a technique pioneered by the EXO experiment which is also accessible to NEXT). The first stage of NEXT has been successfully completed during the period 2009–2013. The prototypes NEXT-DEMO (IFIC) and NEXT-DBDM (Berkeley) were built and operated for more than two years. These apparatuses have demonstrated the main features of the technology. The experiment is currently developing its second phase. The NEW detector is being constructed during 2014 and will operate in the LSC during 2015. The NEXT-100 detector will be built and commissioned during 2016 and 2017 and will start data taking in 2018. NEXT-100 could discover ßß0¿ßß0¿ processes if the period of the decay is equal or less than 6×10256×1025 year. The fourth phase of the experiment (BEXT) could start in 2020. 000056652 536__ $$9info:eu-repo/grantAgreement/ES/MINECO/FIS2012-37947-C04$$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/FPA2009-13698-C04$$9info:eu-repo/grantAgreement/ES/MINECO/Consolider-Ingenio-2010/CSD2008-00037$$9info:eu-repo/grantAgreement/EC/FP7/339787/EU/Towards the NEXT generation of bb0nu experimets/NEXT 000056652 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/ 000056652 592__ $$a0.313$$b2016 000056652 593__ $$aNuclear and High Energy Physics$$c2016$$dQ3 000056652 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000056652 700__ $$0(orcid)0000-0002-6948-5101$$aon behalf of the NEXT collaboration$$uUniversidad de Zaragoza 000056652 7102_ $$12004$$2390$$aUniversidad de Zaragoza$$bDpto. Física Teórica$$cÁrea Física Atóm.Molec.y Nucl. 000056652 773__ $$g273-275 (2016), 1732–1739$$pNuclear and particle physics proceedings.$$tNuclear and Particle Physics Proceedings$$x2405-6014 000056652 8564_ $$s1672799$$uhttps://zaguan.unizar.es/record/56652/files/texto_completo.pdf$$yVersión publicada 000056652 8564_ $$s87070$$uhttps://zaguan.unizar.es/record/56652/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000056652 909CO $$ooai:zaguan.unizar.es:56652$$particulos$$pdriver 000056652 951__ $$a2020-02-21-13:37:20 000056652 980__ $$aARTICLE