000079791 001__ 79791 000079791 005__ 20200221144316.0 000079791 0247_ $$2doi$$a10.1088/1748-0221/11/11/C11011 000079791 0248_ $$2sideral$$a97525 000079791 037__ $$aART-2016-97525 000079791 041__ $$aeng 000079791 100__ $$0(orcid)0000-0002-5352-1884$$aLuzón, G.$$uUniversidad de Zaragoza 000079791 245__ $$aImaging in (high pressure) Micromegas TPC detectors 000079791 260__ $$c2016 000079791 5060_ $$aAccess copy available to the general public$$fUnrestricted 000079791 5203_ $$aThe T-REX project of the group of the University of Zaragoza includes a number of R&D and prototyping activities to explore the applicability of gaseous Time Projection Chambers (TPCs) with Micromesh Gas Structures (Micromegas) in rare event searches where the pattern recognition of the signal is crucial for background discrimination. In the CAST experiment (CERN Axion Solar Telescope) a background level as low as 0.8 × 10-6 counts keV-1 cm-2 s-1 was achieved. Prototyping and simulations promise a 105 better signal-to-noise ratio than CAST for the future IAXO (International Axion Observatory) using x-ray telescopes. A new strategy is also explored in the search of WIMPS based on high gas pressure: the TREX-DM experiment, a low energy threshold detector. In both cases, axion and WIMP searches, the image of the expected signal is quite simple: a one cluster deposition coming from the magnet bore in the case of axions and, if possible, with a tadpole form in the case of WIMPs. It is the case of double beta decay (DBD) where imaging and pattern recognition play a major role. Results obtained in Xe + trimethylamine (TMA) mixture point to a reduction in electron diffusion which improves the quality of the topological pattern, with a positive impact on the discrimination capability, as shown in TREX-ßß prototype. Microbulk Micromegas are able to image the DBD ionization signature with high quality while, at the same time, measuring its energy deposition with a resolution of at least a ~ 3% FWHM at the transition energy Qßß and even better (up to ~ 1% FWHM) as extrapolated from low energy events. That makes Micromegas-based HPXe TPC a very competitive technique for the next generation DBD experiments (as PANDAX-III). Here, it will be shown the last results of the TREX project detectors and software concerning Axions, Dark matter and double beta decay. 000079791 536__ $$9info:eu-repo/grantAgreement/EC/FP7/ 240054/EU/Novel Developments in Time Projection Chambers (TPCs) for Rare Event Searches in Underground Astroparticle EXperiments/TREX$$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/FPA2011-24058$$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/FPA2013-41085-P$$9info:eu-repo/grantAgreement/ES/MINECO/Juan de la Cierva Program 000079791 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/ 000079791 590__ $$a1.22$$b2016 000079791 591__ $$aINSTRUMENTS & INSTRUMENTATION$$b40 / 58 = 0.69$$c2016$$dQ3$$eT3 000079791 592__ $$a0.903$$b2016 000079791 593__ $$aInstrumentation$$c2016$$dQ1 000079791 593__ $$aMathematical Physics$$c2016$$dQ2 000079791 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion 000079791 700__ $$0(orcid)0000-0002-6948-5101$$aCebrián, S.$$uUniversidad de Zaragoza 000079791 700__ $$0(orcid)0000-0003-3532-7540$$aCastel, J.$$uUniversidad de Zaragoza 000079791 700__ $$0(orcid)0000-0002-8921-910X$$aDafni, T.$$uUniversidad de Zaragoza 000079791 700__ $$0(orcid)0000-0001-7529-9834$$aGalán, J. 000079791 700__ $$0(orcid)0000-0003-0800-1588$$aGarza, J. G.$$uUniversidad de Zaragoza 000079791 700__ $$0(orcid)0000-0003-1163-1687$$aIrastorza, I. G.$$uUniversidad de Zaragoza 000079791 700__ $$0(orcid)0000-0001-6327-9369$$aIguaz, F. J.$$uUniversidad de Zaragoza 000079791 700__ $$0(orcid)0000-0002-9951-8680$$aMirallas, H. 000079791 700__ $$0(orcid)0000-0002-2417-7121$$aRuíz-Choliz, E.$$uUniversidad de Zaragoza 000079791 7102_ $$12004$$2X$$aUniversidad de Zaragoza$$bDpto. Física Teórica$$cProy. investigación HCA 000079791 7102_ $$12004$$2390$$aUniversidad de Zaragoza$$bDpto. Física Teórica$$cÁrea Física Atóm.Molec.y Nucl. 000079791 773__ $$g11 (2016), [9 pp.]$$pJournal of Instrumentation$$tJournal of Instrumentation$$x1748-0221 000079791 8564_ $$s542104$$uhttps://zaguan.unizar.es/record/79791/files/texto_completo.pdf$$yPostprint 000079791 8564_ $$s81053$$uhttps://zaguan.unizar.es/record/79791/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint 000079791 909CO $$ooai:zaguan.unizar.es:79791$$particulos$$pdriver 000079791 951__ $$a2020-02-21-13:39:18 000079791 980__ $$aARTICLE