Characterization of a Spherical Proportional Counter in argon-based mixtures

Iguaz, F.J. (Universidad de Zaragoza) ; Rodriguez, A ; Castel, J.F (Universidad de Zaragoza) ; Irastorza, I.G. (Universidad de Zaragoza)
Characterization of a Spherical Proportional Counter in argon-based mixtures
Financiación FP7 / Fp7 Funds
Resumen: The Spherical Proportional Counter is a novel type of radiation detector, with a low energy threshold (typically below 100 eV) and good energy resolution. This detector is being developed by the network NEWS, which includes several applications. We can name between many others Dark Matter searches, low level radon and neutron counting or low energy neutrino detection from supernovas or nuclear reactors via neutrino-nucleus elastic scattering. In this context, this works will present the characterization of a spherical detector of 1 meter diameter using two argon-based mixtures (with methane and isobutane) and for gas pressures between 50 and 1250 mbar. In each case, the energy resolution shows its best value in a wide range of gains, limited by the ballistic effect at low gains and by ion-backflow at high gains. Moreover, the best energy resolution shows a degradation with pressure. These effects will be discussed in terms of gas avalanche properties. Finally, the effect of an electrical field corrector in the homogenity of the gain and the energy threshold measured in our setup will be also discussed.
Idioma: Inglés
Año: 2014
Publicado en: Pos proceedings of science TIPP2014 (2014), 162
ISSN: 1824-8039

Factor impacto SCIMAGO:

Financiación: info:eu-repo/grantAgreement/EC/FP7/ 240054/EU/Novel Developments in Time Projection Chambers (TPCs) for Rare Event Searches in Underground Astroparticle EXperiments/TREX
Tipo y forma: Article (Published version)
Área (Departamento): Proy. investigación HCA (Dpto. Física Teórica)
Área (Departamento): Área Física Atóm.Molec.y Nucl. (Dpto. Física Teórica)

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