Dependence of polytetrafluoroethylene reflectance on thickness at visible and ultraviolet wavelengths in air

[EN] 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...

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Detalles Bibliográficos
Autores: Ghosh, S., Haefner, J., Martín-Albo, J., Guenette, R., Li, X., Loya Villalpando, A.A., Burch, C., Adams, C., Arazi, L., Arnquist, I.J., Azevedo, C.D.R., Bailey, K., Benlloch-Rodríguez, J.M., Rodriguez-Samaniego, Javier, Álvarez-Puerta, Vicente|||0000-0001-6938-8259, Ballester Merelo, Francisco José|||0000-0002-2464-5116, Esteve Bosch, Raul|||0000-0002-1289-6938, Herrero Bosch, Vicente|||0000-0003-0860-2789, Mora Mas, Francisco José|||0000-0003-2281-9546, Toledo Alarcón, José Francisco|||0000-0002-9782-4510
Tipo de recurso: artículo
Fecha de publicación:2020
País:España
Institución:Universitat Politècnica de València (UPV)
Repositorio:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
Idioma:inglés
OAI Identifier:oai:riunet.upv.es:10251/172317
Acceso en línea:https://riunet.upv.es/handle/10251/172317
Access Level:acceso abierto
Palabra clave:Detector design and construction technologies and materials
Double-beta decay detectors
Time projection Chambers (TPC)
TECNOLOGIA ELECTRONICA
Descripción
Sumario:[EN] 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 PIFE 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.

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