1/17/2024 0 Comments Xray diffraction gratings thesisde Provence, Marseille, 2014.).Ĭenter of X-ray Optics. This paper is concerned with the history, properties, development, application, and prospects of soft X-ray (2 300 Å) VLS spectrometers, i.e., spectrometers with reflection diffraction gratings whose spacing varies monotonically across the aperture according to a prescribed law (so-called Varied Line-Space (VLS) gratings). ![]() 12 of Gratings: Theory and Numerical Applications, Ed. Schmidt, Boundary Integral Equation Methods for Conical Diffraction and Short Waves, Chap. Modelling and Simulations (Springer, Berlin, 2007). Invest.: X-Ray, Synchrotron Neutron Tech. Invalidity of the conventional condition of maximal diffraction efficiency observed in previous. thesis in Astronomy & Astrophysics (373 total pages 171 pages of chapters & 141 pages of appendices with 113 figures & 19 tables), The Pennsylvania State University, Advisor: Randall L. Attwood, Soft X-Rays and Extreme Ultraviolet Radiation: Principles and Applications (Cambridge Univ. The problem of X-ray diffraction from multilayer-coated blazed diffraction gratings is analyzed. Accompanying this dissertation are appendices that outline physics fundamentals for x-ray spectral lines, x-ray optics, and diffraction gratings. Hutley, Diffraction Gratings (Academic Press, New York, 1982).ĭ. The maximum achievable efficiency for steeper angles of a non-working facet is somewhat higher. The optimal values of the boundary displacement, which are found from simulating the growth of a W/B 4C 2500/mm grating with a blaze angle of 1.76° and an antiblaze angle of 20°, make it possible to achieve a diffraction efficiency of about 0.82−0.9 relative to the reflection of a multilayer mirror optimized for a wavelength of 1.3 nm. ![]() At a certain orientation of the source and taking into account realistic profile boundaries, the maximum diffraction efficiency of a grating at a given order of the spectrum is predicted to be higher than the similar efficiency of a grating with perfect triangular boundaries positioned strictly vertically one above the other. By controlling the orientation of the source of the depositing material with respect to the groove’s working facet, controlled deformation of the profile can be attained in the nonlinear continuous growth equation. It is established that the displacement of interlayer boundaries is a linear function of the angle of deposition of the material and the change in the profile depth is a nonlinear function. Data from MESA+ Institute (University of Twente). It is shown that changing the angle of deposition of a coating onto a nanostructured substrate with an asymmetric profile (high-frequency blazed grating) has an effect both on smoothing of the groove profile of a multilayer grating (its symmetrization and/ or a decrease in its depth) and induces a significant displacement of the groove-profile maximum either to the left or to the right relative to the substrate profile. X-ray diffraction (a) XRD patterns of VO2 on a) TO measured at 303 K (M1 phase) and 403 K (R phase).
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