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Proceedings Paper

Development of partially-coherent wavefront propagation simulation methods for 3rd and 4th generation synchrotron radiation sources
Author(s): Oleg Chubar; Lonny Berman; Yong S. Chu; Andrei Fluerasu; Steve Hulbert; Mourad Idir; Konstantine Kaznatcheev; David Shapiro; Qun Shen; Jana Baltser
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Paper Abstract

Partially-coherent wavefront propagation calculations have proven to be feasible and very beneficial in the design of beamlines for 3rd and 4th generation Synchrotron Radiation (SR) sources. These types of calculations use the framework of classical electrodynamics for the description, on the same accuracy level, of the emission by relativistic electrons moving in magnetic fields of accelerators, and the propagation of the emitted radiation wavefronts through beamline optical elements. This enables accurate prediction of performance characteristics for beamlines exploiting high SR brightness and/or high spectral flux. Detailed analysis of radiation degree of coherence, offered by the partially-coherent wavefront propagation method, is of paramount importance for modern storage-ring based SR sources, which, thanks to extremely small sub-nanometer-level electron beam emittances, produce substantial portions of coherent flux in X-ray spectral range. We describe the general approach to partially-coherent SR wavefront propagation simulations and present examples of such simulations performed using "Synchrotron Radiation Workshop" (SRW) code for the parameters of hard X-ray undulator based beamlines at the National Synchrotron Light Source II (NSLS-II), Brookhaven National Laboratory. These examples illustrate general characteristics of partially-coherent undulator radiation beams in low-emittance SR sources, and demonstrate advantages of applying high-accuracy physical-optics simulations to the optimization and performance prediction of X-ray optical beamlines in these new sources.

Paper Details

Date Published: 23 September 2011
PDF: 10 pages
Proc. SPIE 8141, Advances in Computational Methods for X-Ray Optics II, 814107 (23 September 2011); doi: 10.1117/12.892812
Show Author Affiliations
Oleg Chubar, Brookhaven National Lab. (United States)
Lonny Berman, Brookhaven National Lab. (United States)
Yong S. Chu, Brookhaven National Lab. (United States)
Andrei Fluerasu, Brookhaven National Lab. (United States)
Steve Hulbert, Brookhaven National Lab. (United States)
Mourad Idir, Brookhaven National Lab. (United States)
Konstantine Kaznatcheev, Brookhaven National Lab. (United States)
David Shapiro, Brookhaven National Lab. (United States)
Qun Shen, Brookhaven National Lab. (United States)
Jana Baltser, Univ. of Copenhagen (Denmark)

Published in SPIE Proceedings Vol. 8141:
Advances in Computational Methods for X-Ray Optics II
Manuel Sanchez del Rio; Oleg Chubar, Editor(s)

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