57721 20250722154011.0 doi 10.1016/j.nima.2015.07.062 sideral 91107 ART-2015-91107 eng Ruiz-Choliz, E. Universidad de Zaragoza (orcid)0000-0002-2417-7121 Modelling the behaviour of microbulk Micromegas in xenon/trimethylamine gas 2015 Access copy available to the general public Unrestricted We model the response of a state of the art micro-hole single-stage charge amplification device ('microbulk' Micromegas) in a gaseous atmosphere consisting of xenon/trimethylamine at various concentrations and pressures. The amplifying structure, made with photo-lithographic techniques similar to those followed in the fabrication of gas electron multipliers (GEMs), consisted of a 100 mu m-side equilateral-triangle pattern with 50 pm-diameter holes placed at its vertexes. Once the primary electrons are guided into the holes by virtue of an optimized field configuration, avalanches develop along the 50 [an-height channels etched out of the original doubly copper-clad polyimide foil. In order to properly account for the strong field gradients at the holes' entrance as well as for the fluctuations of the avalanche process (that ultimately determine the achievable energy resolution), we abandoned the hydrodynamic framework, resorting to a purely microscopic description of the electron trajectories as obtained from elementary cross-sections. We show that achieving a satisfactory description needs additional assumptions about atom-molecule (Penning) transfer reactions and charge recombination to be made. info:eu-repo/grantAgreement/EC/FP7/240054/EU/Novel Developments in Time Projection Chambers (TPCs) for Rare Event Searches in Underground Astroparticle EXperiments/TREX info:eu-repo/grantAgreement/ES/MICINN/CPAN-CSD2007-00042 info:eu-repo/grantAgreement/ES/MINECO/Consolider-Ingenio-2010/CSD2008-00037 info:eu-repo/grantAgreement/ES/MINECO-FEDER/FPA2008-03456 info:eu-repo/grantAgreement/ES/MINECO-FEDER/FPA2009-13697 info:eu-repo/grantAgreement/ES/MINECO-FEDER/FPA2011-24058 info:eu-repo/grantAgreement/ES/MINECO/FPA2013-41085-P info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 1.2 2015 NUCLEAR SCIENCE & TECHNOLOGY 9 / 32 = 0.281 2015 Q2 T1 SPECTROSCOPY 28 / 43 = 0.651 2015 Q3 T2 INSTRUMENTS & INSTRUMENTATION 31 / 56 = 0.554 2015 Q3 T2 PHYSICS, PARTICLES & FIELDS 24 / 28 = 0.857 2015 Q4 T3 0.965 2015 Instrumentation 2015 Q1 Nuclear and High Energy Physics 2015 Q2 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion González-Díaz, D. Diago, A. Castel, J. Universidad de Zaragoza (orcid)0000-0003-3532-7540 Dafni, T. Universidad de Zaragoza (orcid)0000-0002-8921-910X Herrera, D.C. Iguaz, F.J. Universidad de Zaragoza (orcid)0000-0001-6327-9369 Irastorza, I.G. Universidad de Zaragoza (orcid)0000-0003-1163-1687 Luzón, G. Universidad de Zaragoza (orcid)0000-0002-5352-1884 Mirallas, H. (orcid)0000-0002-9951-8680 Sahin, O. Veenhof, R. 2004 X Universidad de Zaragoza Dpto. Física Teórica Proy. investigación HCA 2004 390 Universidad de Zaragoza Dpto. Física Teórica Área Física Atóm.Molec.y Nucl. 799 (2015), 137-146 Nucl. instrum. methods phys. res., Sect. A Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 0168-9002 1938937 http://zaguan.unizar.es/record/57721/files/texto_completo.pdf Versión publicada 114977 http://zaguan.unizar.es/record/57721/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:57721 articulos driver 2025-07-22-15:35:40 ARTICLE