Expected performance of cryogenic silicon monochromator for high power density and high coherence ERL beamlines

17th Pan-American Synchrotron Radiation Instrumentation Conference

Hunag, R.^1 ; Huang, R.^1 ; Finkelstein, K.^1 ; Bilderback, D.H.^1,2

Cornell High Energy Synchrotron Source, Cornell University, Ithaca, NY 14853, United States^1

School of Applied Engineering Physics, Cornell University, Ithaca, NY 14853, United States^2

关键词: Energy recovery linac;    Linear power densities;    Silicon monochromators;    Thermal deformation;    Thermal deformation analysis;    Undulator radiation;    Universal parameters;    Wavefront deformation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/493/1/012035/pdf
DOI  :  10.1088/1742-6596/493/1/012035

来源: IOP

【 摘 要 】

With small emittance and a high degree of X-ray coherence, the Energy Recovery Linac beamlines, proposed at Cornell, need excellent optics to preserve the high quality of X-ray beam. In this paper, thermal deformation of cryogenic silicon monochromators and its effect on wavefront deformation are studied. For crystal thermal deformation analysis, we introduce the so-called modified linear power density as a universal parameter of heat load. For the wavefront simulation, using synchrotron radiation workshop, we study the focusing of source under one-to-one demagnification ratio, for the full central cone of undulator radiations. The studies conclude that cryogenic Si monochromators, in general, are suitable for Cornell energy recovery linac beamlines.