Polarization analysis in magnetic x‐ray scattering using 45° linearly polarized x‐ray incident beam (abstract)

1992 ◽  
Vol 63 (1) ◽  
pp. 1176-1176
Author(s):  
Koichi Mori ◽  
Kazumichi Namikawa ◽  
Yoshisato Funahashi ◽  
Yasuo Higashi ◽  
Masami Ando
Keyword(s):  
Incident Beam ◽  
Polarization Analysis ◽  
X Ray ◽  
X Ray Scattering ◽  
Linearly Polarized ◽  
Ray Scattering

Collimating Montel mirror as part of a multi-crystal analyzer system for resonant inelastic X-ray scattering

2016 ◽  
Vol 23 (4) ◽  
pp. 880-886 ◽  
Author(s):  
Jungho Kim ◽  
Xianbo Shi ◽  
Diego Casa ◽  
Jun Qian ◽  
XianRong Huang ◽  
...  
Keyword(s):  
Energy Resolution ◽  
Incident Beam ◽  
X Rays ◽  
X Ray ◽  
X Ray Scattering ◽  
Angular Acceptance ◽  
Crystal Analyzer ◽  
Present Design ◽  
Photon Source ◽  
Ray Scattering

Advances in resonant inelastic X-ray scattering (RIXS) have come in lockstep with improvements in energy resolution. Currently, the best energy resolution at the IrL3-edge stands at ∼25 meV, which is achieved using a diced Si(844) spherical crystal analyzer. However, spherical analyzers are limited by their intrinsic reflection width. A novel analyzer system using multiple flat crystals provides a promising way to overcome this limitation. For the present design, an energy resolution at or below 10 meV was selected. Recognizing that the angular acceptance of flat crystals is severely limited, a collimating element is essential to achieve the necessary solid-angle acceptance. For this purpose, a laterally graded, parabolic, multilayer Montel mirror was designed for use at the IrL3-absorption edge. It provides an acceptance larger than 10 mrad, collimating the reflected X-ray beam to smaller than 100 µrad, in both vertical and horizontal directions. The performance of this mirror was studied at beamline 27-ID at the Advanced Photon Source. X-rays from a diamond (111) monochromator illuminated a scattering source of diameter 5 µm, generating an incident beam on the mirror with a well determined divergence of 40 mrad. A flat Si(111) crystal after the mirror served as the divergence analyzer. From X-ray measurements, ray-tracing simulations and optical metrology results, it was established that the Montel mirror satisfied the specifications of angular acceptance and collimation quality necessary for a high-resolution RIXS multi-crystal analyzer system.

Scatterless hybrid metal–single-crystal slit for small-angle X-ray scattering and high-resolution X-ray diffraction

2008 ◽  
Vol 41 (6) ◽  
pp. 1134-1139 ◽  
Author(s):  
Youli Li ◽  
Roy Beck ◽  
Tuo Huang ◽  
Myung Chul Choi ◽  
Morito Divinagracia
Keyword(s):  
High Resolution ◽  
Single Crystal ◽  
Small Angle ◽  
Incident Beam ◽  
Single Crystal Substrate ◽  
X Ray Diffraction ◽  
Metal Base ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

A simple hybrid design has been developed to produce practically scatterless aperture slits for small-angle X-ray scattering and high-resolution X-ray diffraction. The hybrid slit consists of a rectangular single-crystal substrate (e.g.Si or Ge) bonded to a high-density metal base with a large taper angle (> 10°). The beam-defining single-crystal tip is oriented far from any Bragg peak position with respect to the incident beam and hence produces none of the slit scattering commonly associated with conventional metal slits. It has been demonstrated that the incorporation of the scatterless slits leads to a much simplified design in small-angle X-ray scattering instruments employing only one or two apertures, with dramatically increased intensity (a threefold increase observed in the test setup) and improved low-angle resolution.

scholarly journals Development of combined microstructure and structure characterization facility forin situandoperandostudies at the Advanced Photon Source

2018 ◽  
Vol 51 (3) ◽  
pp. 867-882 ◽  
Author(s):  
Jan Ilavsky ◽  
Fan Zhang ◽  
Ross N. Andrews ◽  
Ivan Kuzmenko ◽  
Pete R. Jemian ◽  
...  
Keyword(s):  
Small Angle ◽  
National Laboratory ◽  
Argonne National Laboratory ◽  
Incident Beam ◽  
Evolutionary Development ◽  
X Ray ◽  
X Ray Scattering ◽  
Wide Range ◽  
Photon Source ◽  
Ray Scattering

Following many years of evolutionary development, first at the National Synchrotron Light Source, Brookhaven National Laboratory, and then at the Advanced Photon Source (APS), Argonne National Laboratory, the APS ultra-small-angle X-ray scattering (USAXS) facility has been transformed by several new developments. These comprise a conversion to higher-order crystal optics and higher X-ray energies as the standard operating mode, rapid fly scan measurements also as a standard operational mode, automated contiguous pinhole small-angle X-ray scattering (SAXS) measurements at intermediate scattering vectors, and associated rapid wide-angle X-ray scattering (WAXS) measurements for X-ray diffraction without disturbing the sample geometry. With each mode using the USAXS incident beam optics upstream of the sample, USAXS/SAXS/WAXS measurements can now be made within 5 min, allowingin situandoperandomeasurement capabilities with great flexibility under a wide range of sample conditions. These developments are described, together with examples of their application to investigate materials phenomena of technological importance. Developments of two novel USAXS applications, USAXS-based X-ray photon correlation spectroscopy and USAXS imaging, are also briefly reviewed.

SWING detection vacuum tunnel

2011 ◽  
Vol 1 (MEDSI-6) ◽  
Author(s):  
D. Dalle ◽  
J. Perez ◽  
O. Lyon ◽  
P. Feret ◽  
C. Menneglier ◽  
...  
Keyword(s):  
Small Angle ◽  
Vacuum Chamber ◽  
Incident Beam ◽  
Angular Range ◽  
Scattered Intensity ◽  
Long Distance ◽  
General Design ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

The SWING beamline is dedicated to the study of the small-angle X-ray scattering. In order to have the possibility to detect scattered intensity very close to the incident beam, it is absolutely necessary to install the detector at a long distance from the sample. In addition, it is easy to change the detector's position to access a wider angular range. A long and large vacuum chamber, the ‘tunnel’, has been designed with specific mechanisms inside to control the detector's position with micrometre resolution. Special attention has been given so as to offer a very useful device to the users. The paper will present the general design of the tunnel equipped with ancillary devices such as very narrow and stiff beam stoppers, diode holders and beam attenuators.

scholarly journals Resonant inelastic X-ray scattering of magnetic excitations under pressure

2019 ◽  
Vol 26 (5) ◽  
pp. 1725-1732 ◽  
Author(s):  
Matteo Rossi ◽  
Christian Henriquet ◽  
Jeroen Jacobs ◽  
Christian Donnerer ◽  
Stefano Boseggia ◽  
...  
Keyword(s):  
High Pressure ◽  
Low Temperature ◽  
Energy Resolution ◽  
Low Energy ◽  
Polarization Analysis ◽  
Magnetic Excitations ◽  
X Ray ◽  
X Ray Scattering ◽  
Sample Environment ◽  
Ray Scattering

Resonant inelastic X-ray scattering (RIXS) is an extremely valuable tool for the study of elementary, including magnetic, excitations in matter. The latest developments of this technique have mostly been aimed at improving the energy resolution and performing polarization analysis of the scattered radiation, with a great impact on the interpretation and applicability of RIXS. Instead, this article focuses on the sample environment and presents a setup for high-pressure low-temperature RIXS measurements of low-energy excitations. The feasibility of these experiments is proved by probing the magnetic excitations of the bilayer iridate Sr3Ir2O7 at pressures up to 12 GPa.

Use of polarization analysis in the understanding of resonant magnetic x-ray scattering at the L 2 , 3 edges of rare earths

1999 ◽  
Author(s):  
Anne Stunault ◽  
Christian Vettier ◽  
Nick Bernhoeft ◽  
Francois de Bergevin ◽  
C. Dufour ◽  
...  
Keyword(s):  
Rare Earths ◽  
Polarization Analysis ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Geometrical effects in diffraction analysis

1999 ◽  
Vol 55 (2) ◽  
pp. 274-288 ◽  
Author(s):  
N. Bernhoeft
Keyword(s):  
Scattering Amplitudes ◽  
Incident Beam ◽  
Coherent Scattering ◽  
Sample Surface ◽  
Study Phase ◽  
Length Scales ◽  
X Ray ◽  
X Ray Scattering ◽  
Geometrical Effects ◽  
Ray Scattering

The use of X-ray and neutron scattering as a tool to study phase transitions is well established. As techniques improve and experiments are made under successively higher resolution, the need to consider the role of both the distribution of diffracting length scales and the incident-beam coherence volume is emphasized. The interplay of diffracting length scales and the beam coherence volume no longer permits calculation of diffraction profiles in terms of the sample intensity response convolved with an instrumental resolution function. Rather, the probe and sample now enter the calculation on an equal footing at the level of the scattering amplitudes. Under these conditions, it is found that the summation of coherent scattering amplitudes leads to characteristic profiles in wave-vector and, in the case of resonant X-ray scattering, energy space. In this latter case, in the vicinity of strong absorption edges, as used for example in resonant magnetic X-ray diffraction, the energy dependence of diffraction profiles may uniquely allow spatial localization of the scattering volume below the sample surface. This observation may considerably augment the range and power of resonant X-ray scattering.

Polarization analysis of magnetic x‐ray scattering (invited)

1989 ◽  
Vol 60 (7) ◽  
pp. 1655-1660 ◽  
Author(s):  
Doon Gibbs ◽  
M. Blume ◽  
D. R. Harshman ◽  
D. B. McWhan
Keyword(s):  
Polarization Analysis ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

On the intersection of grating truncation rods with the Ewald sphere studied by grazing-incidence small-angle X-ray scattering

2007 ◽  
Vol 40 (6) ◽  
pp. 1050-1055 ◽  
Author(s):  
Minhao Yan ◽  
Alain Gibaud
Keyword(s):  
Small Angle ◽  
Azimuthal Angle ◽  
Incident Beam ◽  
Grazing Incidence ◽  
Precise Location ◽  
X Ray ◽  
X Ray Scattering ◽  
Ewald Sphere ◽  
Statistical Coverage ◽  
Ray Scattering

In this work a grating made of lines having a height of 55 nm and a period of 450 nm has been characterized by grazing-incidence small-angle X-ray scattering (GISAXS). The GISAXS patterns are characterized by a series of spots corresponding to the intersection of the Ewald sphere with the grating truncation rods (GTRs). When the grating lines are almost parallel to the direct beam, the location of these spots is very sensitive to any change in the azimuthal angle. The precise location of the intersection of the GTRs with the Ewald sphere can be calculated for any azimuthal angle. From this analysis we can estimate the statistical coverage of the grating, its period and the width of the lines. In addition, the anisotropy of the width of the spots in theqzdirection is interpreted in terms of wavelength spread and angular divergence of the incident beam.

Sign in / Sign up

Export Citation Format

Share Document