title: Stability of extreme ultraviolet multilayer coatings to low energy proton bombardment.
abstract: In this work we present results of an new experiment related to low energy protons bombardments on nano-structured optical coatings. Multilayer structures protected by different capping layers have been fabricated and exposed to low energy protons (1 keV). The experimental parameters have been selected considering the potential application of the coatings to solar mission instrumentation. Future solar missions will investigate the Sun from very close distances and optical components are constantly exposed to low energy ion particles irradiation. The experiment was repeated fixing the proton flux while varying the total dose accumulated. Results show that physical processes occurred at the uppermost interfaces can strongly damage the structure.
authors.affiliation: Consiglio Nazionale delle Ricerche-Institute for Photonics and Nanotechnologies, Laboratory for Ultraviolet and X-rays Optical Research, via Trasea 7, 35131 Padova, Italy. pelizzo@dei.unipd.it
authors.forename: M G
authors.initials: MG
authors.lastname: Pelizzo
authors.forename: Alain Jody
authors.initials: AJ
authors.lastname: Corso
authors.forename: Paola
authors.initials: P
authors.lastname: Zuppella
authors.forename: D L
authors.initials: DL
authors.lastname: Windt
authors.forename: G
authors.initials: G
authors.lastname: Mattei
authors.forename: P
authors.initials: P
authors.lastname: Nicolosi
mesh_terms: D004867:Equipment Design; D055095:Optics and Photonics; D010316:Particle Size; D011522:Protons; D019445:Solar Activity; D016082:Solar System; D013026:Space Flight; D014466:Ultraviolet Rays
chemical_list: D011522:Protons