1. DESIGN AND FABRICATION OF MULTILAYER MIRRORS FOR He-II RADIATION
- Author
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Masaki Yamamoto, Minaji Furudate, Makoto Watanabe, and Yoshifumi Hotta
- Subjects
Fabrication ,Materials science ,business.industry ,Analytical chemistry ,Surfaces and Interfaces ,Radiation ,Condensed Matter Physics ,Reflectivity ,Surfaces, Coatings and Films ,Wavelength ,Optics ,Sputtering ,Materials Chemistry ,business ,Absorption (electromagnetic radiation) ,Refractive index - Abstract
Design, fabrication, and reflectance evaluation of multilayer mirrors for He-II radiation are described. Based on the available complex refractive indices of materials at the wavelength of 30.4 nm, Mg, Al, Si, Cr, and C were selected as small absorption material to be paired. Mo/Si and Sc found in previous works were also included. In referring to optimum design for the highest reflectance, multilayers of Al/Mg, Au/Mg, C/Mg, Sc/Mg, C/Si, Al/C, and Mo/Si were fabricated by ion-beam sputtering. The highest reflectance of 27% was observed by a 15-period Mg/Sc mirror.
- Published
- 2002
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