Transition metal coatings for reflection polarimeters in the 50-100 eV region

Fabio Frassetto; Paola Zuppella; Fabio Samparisi; Nicola Fabris; Luca Poletto

doi:10.1117/12.2522256

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24 April 2019 Transition metal coatings for reflection polarimeters in the 50-100 eV region

Fabio Frassetto, Paola Zuppella, Fabio Samparisi, Nicola Fabris, Luca Poletto

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Proceedings Volume 11038, X-Ray Free-Electron Lasers: Advances in Source Development and Instrumentation V; 110380M (2019) https://doi.org/10.1117/12.2522256
Event: SPIE Optics + Optoelectronics, 2019, Prague, Czech Republic

Abstract

Spectroscopic experiments requiring the knowledge of the specific state of light polarization for synchrotron radiation, high-order laser harmonics and free-electron lasers are increasing in the recent years. Correspondingly, there has been an increasing demand for systems to measure polarization in the extreme ultraviolet (XUV) and soft X-ray (SX) regions. Polarization can be measured at a specific wavelength through the use of polarizers based on multilayer coatings, that are almost routinely available. The measurement on a broad band requires to operate at grazing incidence with metallic coatings. It is here presented the design and performances of a reflection polarimeter to be used in the 50-100 eV region with transition metal-coated optics. With respect to standard polarimeters, based on gold-coated optics, the presented coatings gives higher flux and higher contrast between phase and reflectivity responses for s- and p-polarized light. The optical and mechanical design of the polarimeter and the estimated throughput are discussed.

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Fabio Frassetto, Paola Zuppella, Fabio Samparisi, Nicola Fabris, and Luca Poletto "Transition metal coatings for reflection polarimeters in the 50-100 eV region", Proc. SPIE 11038, X-Ray Free-Electron Lasers: Advances in Source Development and Instrumentation V, 110380M (24 April 2019); https://doi.org/10.1117/12.2522256

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