Mathematics – Logic
Scientific paper
Apr 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998rsci...69.1893k&link_type=abstract
Review of Scientific Instruments, Volume 69, Issue 4, pp. 1893-1897 (1998).
Mathematics
Logic
1
X- And Gamma-Ray Sources, Mirrors, Gratings, And Detectors, Spaceborne And Space Research Instruments, Apparatus, And Components, X- And Gamma-Ray Telescopes And Instrumentation, Vacuum Tubes
Scientific paper
Definitive mineralogical identification of materials with x-ray diffraction and fluorescence on remote planetary probes requires the development of a rugged miniature x-ray source that complies with the mass, power, thermal, and electrical management constraints imposed by space missions. Conventional x-ray tubes are generally fragile, glass-envelope designs with heat-sensitive seals. They are too brittle and bulky for planetary missions, and usually require cumbersome and power-consuming cooling systems. Here we describe the development of a novel, rugged miniature x-ray source employing a ceramic BeO substrate upon which a metal target material is deposited. Conventional thermionic emission and high-voltage acceleration of electrons to strike the metal target material produce an x-ray yield comparable to conventional x-ray tubes. Thermal management of the x-ray source is achieved with the excellent heat transport properties of the BeO target substrate coupled with a passive heatpipe.
Koppel L. N.
Marshall Jonathan R.
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