Dependence of the damage in optical metal/dielectric coatings on the energy of ions in irradiation experiments for space qualification

Maria G. Pelizzo, Alain J. Corso, Giovanni Santi, René Hübner, Denis Garoli, Dominic Doyle, Philip Lubin, Alexander N. Cohen, Jacob Erlikhman, Giulio Favaro, Marco Bazzan, Jon Drobny, Davide Curreli, Maxim Umansky

Research output: Contribution to journalArticlepeer-review

Abstract

Terrestrial accelerator facilities can generate ion beams which enable the testing of the resistance of materials and thin film coatings to be used in the space environment. In this work, a TiO 2/Al bi-layer coating has been irradiated with a He + beam at three different energies. The same flux and dose have been used in order to investigate the damage dependence on the energy. The energies were selected to be in the range 4–100 keV, in order to consider those associated to the quiet solar wind and to the particles present in the near-Earth space environment. The optical, morphological and structural modifications have been investigated by using various techniques. Surprisingly, the most damaged sample is the one irradiated at the intermediate energy, which, on the other hand, corresponds to the case in which the interface between the two layers is more stressed. Results demonstrate that ion energies for irradiation tests must be carefully selected to properly qualify space components.

Original languageEnglish (US)
Article number3429
JournalScientific reports
Volume11
Issue number1
DOIs
StatePublished - Dec 2021

ASJC Scopus subject areas

  • General

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