Development of partially-coherent wavefront propagation simulation methods for 3rd and 4th generation synchrotron radiation sources

2011 ◽  
Author(s):  
Oleg Chubar ◽  
Lonny Berman ◽  
Yong S. Chu ◽  
Andrei Fluerasu ◽  
Steve Hulbert ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Simulation Methods ◽  
Partially Coherent ◽  
Wavefront Propagation ◽  
Radiation Sources

Partially coherent X-ray wavefront propagation simulations including grazing-incidence focusing optics

2014 ◽  
Vol 21 (5) ◽  
pp. 1110-1121 ◽  
Author(s):  
Niccolo Canestrari ◽  
Oleg Chubar ◽  
Ruben Reininger
Keyword(s):  
Synchrotron Radiation ◽  
National Laboratory ◽  
Grazing Incidence ◽  
Brookhaven National Laboratory ◽  
Wave Optics ◽  
X Rays ◽  
X Ray ◽  
Partially Coherent ◽  
Wavefront Propagation ◽  
Simulation Results

X-ray beamlines in modern synchrotron radiation sources make extensive use of grazing-incidence reflective optics, in particular Kirkpatrick–Baez elliptical mirror systems. These systems can focus the incoming X-rays down to nanometer-scale spot sizes while maintaining relatively large acceptance apertures and high flux in the focused radiation spots. In low-emittance storage rings and in free-electron lasers such systems are used with partially or even nearly fully coherent X-ray beams and often target diffraction-limited resolution. Therefore, their accurate simulation and modeling has to be performed within the framework of wave optics. Here the implementation and benchmarking of a wave-optics method for the simulation of grazing-incidence mirrors based on the local stationary-phase approximation or, in other words, the local propagation of the radiation electric field along geometrical rays, is described. The proposed method is CPU-efficient and fully compatible with the numerical methods of Fourier optics. It has been implemented in theSynchrotron Radiation Workshop(SRW) computer code and extensively tested against the geometrical ray-tracing codeSHADOW. The test simulations have been performed for cases without and with diffraction at mirror apertures, including cases where the grazing-incidence mirrors can be hardly approximated by ideal lenses. Good agreement between theSRWandSHADOWsimulation results is observed in the cases without diffraction. The differences between the simulation results obtained by the two codes in diffraction-dominated cases for illumination with fully or partially coherent radiation are analyzed and interpreted. The application of the new method for the simulation of wavefront propagation through a high-resolution X-ray microspectroscopy beamline at the National Synchrotron Light Source II (Brookhaven National Laboratory, USA) is demonstrated.

scholarly journals X‐ray monochromator system for use with synchrotron radiation sources

1981 ◽  
Vol 52 (4) ◽  
pp. 509-516 ◽  
Author(s):  
J. A. Golovchenko ◽  
R. A. Levesque ◽  
P. L. Cowan
Keyword(s):  
Synchrotron Radiation ◽  
X Ray ◽  
Radiation Sources

Machine Learning Powered by Principal Component Descriptors as the Key for Sorted Structural Fit of XANES

2021 ◽  
Author(s):  
Andrea Martini ◽  
Alexander A. Guda ◽  
Sergey A. Guda ◽  
Aram L. Bugaev ◽  
Olga V. Safonova ◽  
...  
Keyword(s):  
Machine Learning ◽  
Structural Analysis ◽  
Synchrotron Radiation ◽  
Free Electron Laser ◽  
Principal Component ◽  
Analytical Tool ◽  
X Ray ◽  
Radiation Sources ◽  
X Ray Absorption

Modern synchrotron radiation sources and free electron laser made X-ray absorption spectroscopy (XAS) an analytical tool for the structural analysis of materials under in situ or operando conditions. Fourier approach...

Sign in / Sign up

Export Citation Format

Share Document