LIGO Document G1602273-v1

Guestimation of large angle scattering

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G - Presentations (eg Graphics)
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There are not enough data nor knowledge to calculate the large angle
scattering off by mirrors in LIGO interferometers. This makes it difficult to
understand the cause of the loss in the arm and to predict various noises induced by stray lights. This talk summarizes data and formulations which will
be helpful to guestimate the large angle scattering. Various mystic terminologies, phasemaps, PSD, BRDF, golden rules and cavity loss, and their relations will be clarified.
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