聚氟乙烯反射率对空气中可见和紫外线波长的厚度的依赖性

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聚氟乙烯反射率对空气中可见和紫外线波长的厚度的依赖性

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

论文作者

Ghosh, S., Haefner, J., Martín-Albo, J., Guenette, R., Li, X., Villalpando, A. A. Loya, 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., 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., Morata, J. A. Hernando, 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., Vidal, J. Muñoz, Novella, P., Nygren, D. R., Palmeiro, B., Para, A., Pérez, J., Querol, M., Redwine, A., Renner, J., Repond, J., Riordan, S., Ripoll, L., García, Y. Rodríguez, Rodríguez, J., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, 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.

论文摘要

聚氟乙烯（PTFE）是一种在光收集系统中广泛用于粒子物理实验的极好的弥漫性反射器。但是，PTFE的反射率是其厚度的函数。在这项工作中，我们使用两种互补方法研究了空气中的这种依赖性，以实现260 nm和450 nm的波长。我们发现，PTFE的反射率从5 mm到10 mm的厚度在450 nm时的厚度为92.5％至94.5％，在260 nm时从90.0％到92.0％。我们还看到，在同一材料中，给定厚度的PTFE的反射率可以变化多达2.7％。最后，我们表明将镜面反射器放在PTFE后面可以恢复可见的反射率损失，而无需在反射率中引入镜面成分。

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.

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