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Proceedings Paper

Carbon nanotube-based digital vacuum electronics and miniature instrumentation for space exploration
Author(s): H. Manohara; R. Toda; R. H. Lin; A. Liao; M. Mojarradi
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Paper Abstract

JPL has developed high performance cold cathodes using arrays of carbon nanotube bundles that produce > 15 A/cm2 at applied fields of 5 to 8 V/μm without any beam focusing. They have exhibited robust operation in poor vacuums of 10-6 to 10-4 Torr- a typically achievable range inside hermetically sealed microcavities. Using these CNT cathodes JPL has developed miniature X-ray tubes capable of delivering sufficient photon flux at acceleration voltages of <20kV to perform definitive mineralogy on planetary surfaces; mass ionizers that offer two orders of magnitude power savings, and S/N ratio better by a factor of five over conventional ionizers. JPL has also developed a new class of programmable logic gates using CNT vacuum electronics potentially for Venus in situ missions and defense applications. These "digital" vacuum electronic devices are inherently high-temperature tolerant and radiation insensitive. Device design, fabrication and DC switching operation at temperatures up to 700° C are presented in this paper.

Paper Details

Date Published: 17 February 2010
PDF: 5 pages
Proc. SPIE 7594, MOEMS and Miniaturized Systems IX, 75940Q (17 February 2010); doi: 10.1117/12.844076
Show Author Affiliations
H. Manohara, Jet Propulsion Lab. (United States)
R. Toda, Jet Propulsion Lab. (United States)
R. H. Lin, Jet Propulsion Lab. (United States)
A. Liao, Jet Propulsion Lab. (United States)
M. Mojarradi, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 7594:
MOEMS and Miniaturized Systems IX
Harald Schenk; Wibool Piyawattanametha, Editor(s)

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