97404 20210902121841.0 doi 10.1088/1748-0221/15/11/P11031 sideral 121789 ART-2020-121789 eng Ghosh, S. Dependence of polytetrafluoroethylene reflectance on thickness at visible and ultraviolet wavelengths in air 2020 Access copy available to the general public Unrestricted Polytetrafluoroethylene (PTFE) is an excellent diffuse reflector widely used in light collection systems for particle physics experiments. However, the reflectance of PTFE is a function of its thickness. In this work, we investigate this dependence in air for light of wavelengths 260 nm and 450 nm using two complementary methods. We find that PTFE reflectance for thicknesses from 5 mm to 10 mm ranges from 92.5% to 94.5% at 450 nm, and from 90.0% to 92.0% at 260 nm. We also see that the reflectance of PTFE of a given thickness can vary by as much as 2.7% within the same piece of material. Finally, we show that placing a specular reflector behind the PTFE can recover the loss of reflectance in the visible without introducing a specular component in the reflectance. info:eu-repo/grantAgreement/EC/H2020/674896/EU/The Elusives Enterprise: Asymmetries of the Invisible Universe/ELUSIVES This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 674896-ELUSIVES info:eu-repo/grantAgreement/EC/H2020/690575/EU/InvisiblesPlus/InvisiblesPlus This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 690575-InvisiblesPlus info:eu-repo/grantAgreement/EC/H2020/740055/EU/Molecule for low diffusion TPCs for rare event searches/MELODIC This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 740055-MELODIC info:eu-repo/grantAgreement/ES/MINECO-MCIU/FIS2014-53371-C04 info:eu-repo/grantAgreement/ES/MINECO-MCIU/RTI2018-095979 info:eu-repo/grantAgreement/ES/MINECO/MDM-2016-0692 info:eu-repo/grantAgreement/ES/MINECO/SEV-2014-0398 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 1.415 2020 INSTRUMENTS & INSTRUMENTATION 50 / 64 = 0.781 2020 Q4 T3 0.74 2020 Mathematical Physics 2020 Q1 Instrumentation 2020 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Haefner, J. Martín-Albo, J. Guenette, R. Li, X. Loya Villalpando, A.A. Burch, C. Adams, C. Álvarez, V. Arazi, L. Arnquist, I.J. Azevedo, C.D.R. Bailey, K. Ballester, F. Benlloch-Rodríguez, J.M. Borges, F.I.G.M. Byrnes, N. Cárcel, S. Carrión, J.V. Cebrián, S. Universidad de Zaragoza (orcid)0000-0002-6948-5101 Church, E. Conde, C.A.N. Contreras, T. Díaz, G. Díaz, J. Diesburg, M. Escada, J. Esteve, R. Felkai, R. Fernandes, A.F.M. Fernandes, L.M.P. Ferrario, P. Ferreira, A.L. Freitas, E.D.C. Goldschmidt, A. Gómez-Cadenas, J.J. González-Díaz, D. Gutiérrez, R.M. Hafidi, K. Hauptman, J. Henriques, C.A.O. Hernando Morata, J.A. Herrero, P. Herrero, V. Ifergan, Y. Jones, B.J.P. Kekic, M. Labarga, L. Laing, A. Lebrun, P. López-March, N. Losada, M. Mano, R.D.P. Martínez, A. Martínez-Vara, M. Martínez-Lema, G. McDonald, A.D. Monrabal, F. Monteiro, C.M.B. Mora, F.J. Muñoz Vidal, J. Novella, P. Nygren, D.R. Palmeiro, B. Para, A. Pérez, J. Querol, M. Redwine, A. Renner, J. Repond, J. Riordan, S. Ripoll, L. Rodríguez García, Y. Rodríguez, J. Rogers, L. Romeo, B. Romo-Luque, C. Santos, F.P. dos Santos, J.M.F. Simón, A. Sorel, M. Stiegler, T. Toledo, J.F. Torrent, J. Usón, A. Veloso, J.F.C.A. Webb, R. Weiss-Babai, R. White, J.T. Woodruff, K. Yahlali, N. The, NEXT, collaboration 2004 390 Universidad de Zaragoza Dpto. Física Teórica Área Física Atóm.Molec.y Nucl. 15, 11 (2020), [16 pp] Journal of Instrumentation Journal of Instrumentation 1748-0221 494001 http://zaguan.unizar.es/record/97404/files/texto_completo.pdf Postprint 389349 http://zaguan.unizar.es/record/97404/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:97404 articulos driver 2021-09-02-10:23:25 ARTICLE