Liquid-nitrogen cooling of silicon crystal monochromators: ESRF development

Gerard Marot; Michel Rossat

doi:10.1117/12.140512

25 February 1993 Liquid-nitrogen cooling of silicon crystal monochromators: ESRF development

Gerard Marot, Michel Rossat

Proceedings Volume 1739, High Heat Flux Engineering; (1993) https://doi.org/10.1117/12.140512
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

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.

Citation Download Citation

Gerard Marot and Michel Rossat "Liquid-nitrogen cooling of silicon crystal monochromators: ESRF development", Proc. SPIE 1739, High Heat Flux Engineering, (25 February 1993); https://doi.org/10.1117/12.140512

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