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Proceedings Paper

Liquid-nitrogen cooling of silicon crystal monochromators: ESRF development
Author(s): Gerard Marot; Michel Rossat
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Paper 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.

Paper Details

Date Published: 25 February 1993
PDF: 10 pages
Proc. SPIE 1739, High Heat Flux Engineering, (25 February 1993); doi: 10.1117/12.140512
Show Author Affiliations
Gerard Marot, European Synchrotron Radiation Facility (France)
Michel Rossat, European Synchrotron Radiation Facility (France)

Published in SPIE Proceedings Vol. 1739:
High Heat Flux Engineering
Ali M. Khounsary, Editor(s)

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