Reflection losses in polystyrene fibres

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 306; no. 3; pp. 549 - 556
• Main Authors: D'Ambrosio, C., Leutz, H., Taufer, M., Shimizu, T., Shinji, O., Sun, J.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.09.1991
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/0168-9002(91)90051-Q

The reflection losses, which occur during light guidance through polystyrene fibres of 30 μm diameter at their core-cladding interface, have been determined in order to evaluate their contribution to the total light attenuation of scintillating fibres. For the deviation (1 - q) of the reflection coefficient q from unity we obtained: 6 × 10 −5 (at 458 nm), 5.36 × 10 −5 (at 514 nm) and 5 × 10 −5 (at 633 nm). In addition, we found light losses in the polystyrene core, which we attribute to Rayleigh scattering on submicron density variations in polystyrene. The resulting scattering lengths are: 3.6 m (at 420 nm) and 9.5 m (at 530 nm).