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6 October 2011Long term stability of optical coatings in close solar environment
Close observations of the solar atmosphere and surface are required in order to understand the solar activity and its
influence on Earth. This task will be performed from Solar Orbiter mission which will reach a very close distance from
the Sun: the minimum perihelion distance will be only 0.28 AU. At these distances, the spacecraft and instruments are
immersed in a very harsh environment characterized by high temperature, solar wind particles and ions. The stability of
the optical coatings at these working conditions are a crucial point in an instrument design and a thorough investigation
of the environment effects must be carried out for a secure validation. In this work we present the first experiment
carried on in laboratory to establish the effect of solar wind low energy particles bombardment in some optical coatings.
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Alain Jody Corso, Paola Zuppella, Piergiorgio Nicolosi, Maria Guglielmina Pelizzo, "Long term stability of optical coatings in close solar environment," Proc. SPIE 8148, Solar Physics and Space Weather Instrumentation IV, 81480X (6 October 2011); https://doi.org/10.1117/12.898218