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

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