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15 October 2012 Parameterizing the deformation of LN2-cooled silicon monochromator crystals with modified linear power density funtion
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Abstract
The very low emittance and low energy spread source of a future Cornell energy recovery linac (ERL) will be equipped with long undulators of large numbers of short period magnets. The power density in the undulator radiation central cone will be much higher than that from normal undulators at current 3rd generation sources. The deformation of liquid nitrogen (LN2) cooled silicon crystal monochromators for ERL beamlines is evaluated by parameterizing the thermal problem with a modified linear power density function based on a simplified analytical model. This provides a clear and “universal” description of thermal deformation under different thermal footprints, variable loads and is independent of specific facility. The characteristics of thermal deformation of LN2-cooled Si crystals for Cornell ERL undulators is also given using finite element analysis (FEA).
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Rong Huang and Donald H. Bilderback "Parameterizing the deformation of LN2-cooled silicon monochromator crystals with modified linear power density funtion", Proc. SPIE 8502, Advances in X-Ray/EUV Optics and Components VII, 85020B (15 October 2012); https://doi.org/10.1117/12.931421
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