@article{dcdb1a31fe7a42e0a97411efb89a58be,
title = "Dependence of polytetrafluoroethylene reflectance on thickness at visible and ultraviolet wavelengths in air",
abstract = "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.",
keywords = "Detector design and construction technologies and materials, Double-beta decay detectors, Time projection Chambers (TPC)",
author = "{The Next Collaboration} and S. Ghosh and J. Haefner and J. Mart{\'i}n-Albo and R. Guenette and X. Li and {Loya Villalpando}, {A. A.} and C. Burch and C. Adams and V. {\'A}lvarez and L. Arazi and Arnquist, {I. J.} and Azevedo, {C. D.R.} and K. Bailey and F. Ballester and Benlloch-Rodr{\'i}guez, {J. M.} and Borges, {F. I.G.M.} and N. Byrnes and S. C{\'a}rcel and Carri{\'o}n, {J. V.} and S. Cebri{\'a}n and E. Church and Conde, {C. A.N.} and T. Contreras and G. D{\'i}az and J. D{\'i}az and M. Diesburg and J. Escada and R. Esteve and R. Felkai and Fernandes, {A. F.M.} and Fernandes, {L. M.P.} and P. Ferrario and Ferreira, {A. L.} and Freitas, {E. D.C.} and A. Goldschmidt and G{\'o}mez-Cadenas, {J. J.} and D. Gonz{\'a}lez-D{\'i}az and Guti{\'e}rrez, {R. M.} and K. Hafidi and J. Hauptman and Henriques, {C. A.O.} and {Hernando Morata}, {J. A.} and P. Herrero and V. Herrero and Y. Ifergan and Jones, {B. J.P.} and M. Kekic and L. Labarga and G. Mart{\'i}nez-Lema and A. Sim{\'o}n",
note = "Publisher Copyright: {\textcopyright} 2020 IOP Publishing Ltd and Sissa Medialab",
year = "2020",
month = nov,
day = "1",
doi = "10.1088/1748-0221/15/11/P11031",
language = "English",
volume = "15",
journal = "Journal of Instrumentation",
issn = "1748-0221",
publisher = "IOP Publishing Ltd.",
number = "11",
}