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Achieving cryogenic temperatures in deep space using a coating

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Abstract

There is a current need to develop coatings that can reject more than 99% of the sun’s irradiance to enable cryogenic storage and superconductor operation in space. Such a coating is proposed, composed of broadband scatterers on a metallic reflecting layer, yielding a surface that backscatters most of the solar spectrum yet still emits far-IR radiation. A model is presented with results, showing that a properly designed coating may potentially backscatter more than 99.9% of the sun’s energy and allowing temperatures below 50 K to be achieved.

© 2016 Optical Society of America

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