Investigates reflectivity properties in selected materials for optical modules, indicating optimal choices for underwater light detection.
The reflectivity properties of different materials have been studied in order to select the best material to be used in the NEMO Directional Optical Module. The Cherenkov light produced in water by muons has been simulated with a monochromatic coherent laser of 476 nm of wavelength; to reduce refractive effects, a semi-cylinder shaped piece of Plexiglas has been used to simulate the light guide. Different reflecting materials have been matched to the Plexiglas and reflected light power has been measured by a photodiode as a function of incident light angle.
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M. et al. (2007) studied this question.
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