25 February 1993 Liquid-nitrogen cooling of silicon crystal monochromators: ESRF development
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At the ESRF, the power absorbed by the first optical element will vary between a hundred watts on undulator beamlines, and several kilowatts on wiggler beamlines. One consequence is a distortion of the optical element, leading to a degradation of the performances of the beamline optics. Cooling certain materials (Si, Ge, InSb) to low temperature (typically around 125 K for Si) was proposed as a possibility to reduce the thermal deformation. In this paper, we report on the development of liquid nitrogen cooling of silicon crystal monochromators for ESRF beamlines. First, a prototype of a closed liquid nitrogen loop is presented., Then, hydraulic and thermal measurements are given, showing the influence of the flow rate, the pressure, and of the absorbed power.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Gerard Marot, Gerard Marot, Michel Rossat, Michel Rossat, } "Liquid-nitrogen cooling of silicon crystal monochromators: ESRF development", Proc. SPIE 1739, High Heat Flux Engineering, (25 February 1993); doi: 10.1117/12.140512; https://doi.org/10.1117/12.140512


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