Global optimization of two-multilayer mirror objective for focusing soft X-ray high harmonics

2019 ◽  
Author(s):  
Mitsunori Toyoda ◽  
Shota Yamashita ◽  
Jun Chen
Keyword(s):  
Global Optimization ◽  
X Ray ◽  
Multilayer Mirror ◽  
High Harmonics

Soft X-ray photon energy calibration using multilayer mirror

2020 ◽  
Author(s):  
Kiranjot ◽  
Mangalika Sinha ◽  
R. K. Gupta ◽  
P. K. Yadav ◽  
Mohammed H. Modi
Keyword(s):  
Photon Energy ◽  
Energy Calibration ◽  
X Ray ◽  
Multilayer Mirror

Design of a multilayer mirror monochromatic x-ray imager for the Z accelerator

2004 ◽  
Vol 75 (10) ◽  
pp. 4029-4032 ◽  
Author(s):  
B. Jones ◽  
C. Deeney ◽  
A. Pirela ◽  
C. Meyer ◽  
D. Petmecky ◽  
...  
Keyword(s):  
X Ray ◽  
Multilayer Mirror

Multilayer mirror based soft x-ray spectrometer as a high temperature plasma diagnostic

2001 ◽  
Vol 72 (1) ◽  
pp. 1183-1187 ◽  
Author(s):  
S. Duorah ◽  
A. Ejiri ◽  
S. Lee ◽  
H. Iguchi ◽  
A. Fujisawa ◽  
...  
Keyword(s):  
High Temperature ◽  
Plasma Diagnostic ◽  
Temperature Plasma ◽  
X Ray ◽  
Multilayer Mirror ◽  
High Temperature Plasma

The determination of crystal size and disorder from X-ray diffraction photographs of polymer fibres. 1. The accuracy of determination of Fourier coefficients of the intensity profile of a reflection

1989 ◽  
Vol 22 (4) ◽  
pp. 363-371 ◽  
Author(s):  
R. Somashekar ◽  
I. H. Hall ◽  
P. D. Carr
Keyword(s):  
Crystal Size ◽  
Fourier Coefficients ◽  
Intensity Profile ◽  
X Ray Diffraction ◽  
Scattering Angle ◽  
X Ray ◽  
Fourier Cosine ◽  
High Harmonics ◽  
Lattice Planes

Methods which determine the number and disorder of lattice planes in a crystal from the Fourier cosine coefficients of the intensity profile of an X-ray reflection use only the low harmonics and require that the coefficients be normalized so that the zero harmonic is unity. Experimentally, the profiles can only be recorded over a smaller range of scattering angle than required by the theory, and it is necessary to subtract background, which is likely to be estimated with considerable error, before determining the coefficients. It is shown that with polymer fibres this causes serious errors in the normalization, and in the values of those low harmonics used in the size and disorder determination, and prevents reliable values being obtained. Methods which avoid normalization and use only high harmonics are needed. It is shown that disorder may be obtained in such a way, but not size, for which low-order normalized coefficients are essential. A method of extrapolation is described and tested which enables the accurate high harmonics to be used to improve the estimates of the low ones. Whilst this will yield more reliable values of crystal size than are obtainable from existing methods, the accuracy depends entirely on the validity of the extrapolation, which cannot be tested in many cases of interest.

scholarly journals A global optimization method for the molecular replacement problem in X-ray crystallography

2005 ◽  
Vol 103 (2) ◽  
pp. 399-426
Author(s):  
Diane C. Jamrog ◽  
George N. Phillips Jr. ◽  
Richard A. Tapia ◽  
Yin Zhang
Keyword(s):  
Global Optimization ◽  
Optimization Method ◽  
Molecular Replacement ◽  
Global Optimization Method ◽  
X Ray ◽  
X Ray Crystallography ◽  
Replacement Problem

Intrinsic roughness and interfaces of Cr/Be multilayers

2021 ◽  
Vol 54 (6) ◽  
Author(s):  
Roman Pleshkov ◽  
Nikolay Chkhalo ◽  
Vladimir Polkovnikov ◽  
Mikhail Svechnikov ◽  
Maria Zorina
Keyword(s):  
Atomic Force Microscopy ◽  
Optical Contrast ◽  
Multilayer Mirrors ◽  
X Ray ◽  
Force Microscopy ◽  
Layer Material ◽  
Multilayer Mirror ◽  
X Ray Scattering ◽  
Atomic Force ◽  
Sharp Structure

The structures of Cr/Be multilayer mirror interfaces are investigated using X-ray reflectometry, diffuse X-ray scattering and atomic force microscopy. The combination of these methods makes it possible to separate the contributions of roughness and interlayer diffusion/intermixing for each sample. In the range of period thicknesses of 2.26–0.8 nm, it is found that the growth roughness of the Cr/Be multilayer mirrors does not depend on the period thickness and is ∼0.2 nm. The separation of roughness and diffuseness allows estimation of layer material intermixing and the resulting drop in the optical contrast, which is from 0.85 to 0.17 in comparison with an ideally sharp structure.

High throughput measurements of soft x-ray impurity emission using a multilayer mirror telescope

2006 ◽  
Vol 77 (10) ◽  
pp. 10F330 ◽  
Author(s):  
D. Stutman ◽  
K. Tritz ◽  
L. Delgado-Aparicio ◽  
M. Finkenthal ◽  
G. Suliman ◽  
...  
Keyword(s):  
High Throughput ◽  
X Ray ◽  
Multilayer Mirror ◽  
Mirror Telescope

In-Situ High Temperature Study of Ceramics and Ceramic Ultra-Thin Films Using a X-Ray Diffractometer with a Parabolic Multilayer Mirror

2001 ◽  
Vol 206-213 ◽  
pp. 775-778 ◽  
Author(s):  
Gert Roebben ◽  
Chao Zhao ◽  
Ren-Guan Duan ◽  
Jef Vleugels ◽  
Marc M. Heyns ◽  
...  
Keyword(s):  
Thin Films ◽  
High Temperature ◽  
X Ray ◽  
Temperature Study ◽  
Multilayer Mirror ◽  
High Temperature Study

Influence of higher harmonics of the undulator in X-ray polarimetry and crystal monochromator design

2015 ◽  
Vol 22 (5) ◽  
pp. 1151-1154 ◽  
Author(s):  
Berit Marx-Glowna ◽  
Kai S. Schulze ◽  
Ingo Uschmann ◽  
Tino Kämpfer ◽  
Günter Weber ◽  
...  
Keyword(s):  
Multiple Reflection ◽  
Higher Harmonics ◽  
Undulator Radiation ◽  
X Ray ◽  
High Harmonics ◽  
Even Harmonics

The spectrum of the undulator radiation of beamline P01 at Petra III has been measured after passing a multiple reflection channel-cut polarimeter. Odd and even harmonics up to the 15th order, as well as Compton peaks which were produced by the high harmonics in the spectrum, could been measured. These additional contributions can have a tremendous influence on the performance of the polarimeter and have to be taken into account for further polarimeter designs.

Circularly Polarized Soft X-Ray High Harmonics and XMCD on a Tabletop

2015 ◽  
Author(s):  
Tingting Fan ◽  
Patrik Gychtol ◽  
Ronny Knut ◽  
Carlos Hernández-García ◽  
Daniel Hickstein ◽  
...  
Keyword(s):  
Circularly Polarized ◽  
X Ray ◽  
High Harmonics
Sign in / Sign up

Export Citation Format

Share Document