| Autor: |
Peter Bulicke, D. Menke, Klaus Heidemann, D. Fuchs, O. Wehmeyer, Marco Wedowski, Ulrich Heinzmann, Gerhard Ulm, Ulf Kleineberg, H.J. Stock, K. Osterried |
| Jazyk: |
angličtina |
| Rok vydání: |
1997 |
| Předmět: |
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| Popis: |
We report about the diffraction efficiencies of two new types of multilayer diffraction gratings, one of them being proposed for high spectral dispersion ability due to a high line density in the photon energy range around 90 eV, while the other is being proposed as a multilayer grating working in the water window spectral range around 470 eV at near normal incidence angles. For a 6600 L/mm sinusoidal interference grating coated with 18 Mo/Si doublelayers of d = 8.2 nm absolute diffraction efficiencies up to 11 % at a wavelength .\ = 13.2 nm were measured in each first diffraction order. A 2400 L/mm laminar grating was coated with 60 Ti/C bilayers of d = 2.2 nm for high efficiency in the water window spectral range near the Ti-L edge (.\ = 2.77 nm). For a similar Ti/C multilayer mirror refiectivities of 11 % were measured at a wavelength ) = 2.7 nm and an angle of incidence a = 59 deg. First order diffraction efficiencies of about 0.7 % were measured for the Ti/C multilayer grating. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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