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Proceedings Paper

Design of a graphite filter/beryllium window for CHESS wiggler beamlines
Author(s): Qun Shen; Karl W. Smolenski; Ernest Fontes
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Paper Abstract

We present a graphite-filter/beryllium-window design for the high power wiggler beam lines at CHESS. This design, which has been in operation since 1993 and proves to be very successful, employs a 0.25 mm thick highly-oriented pyrolytic graphite (HOPG) foil as a prefilter to reduce the heat load on the first vacuum beryllium window. Unlike most graphite filter designs in other synchrotron sources that rely entirely on radiative cooling, the HOPG filter in our design is brazed onto a water-cooled copper flange which substantially lowers its maximum temperature and prolongs its operational lifetime. We discuss the safety criteria that we have established based on theoretical calculations and infrared temperature measurements on the graphite filter and the beryllium window.

Paper Details

Date Published: 11 December 1997
PDF: 7 pages
Proc. SPIE 3151, High Heat Flux and Synchrotron Radiation Beamlines, (11 December 1997); doi: 10.1117/12.294470
Show Author Affiliations
Qun Shen, Cornell Univ. (United States)
Karl W. Smolenski, Cornell Univ. (United States)
Ernest Fontes, Cornell Univ. (United States)

Published in SPIE Proceedings Vol. 3151:
High Heat Flux and Synchrotron Radiation Beamlines
Albert T. Macrander; Ali M. Khounsary, Editor(s)

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