Carbon nanotube-based digital vacuum electronics and miniature instrumentation for space exploration

Details Carbon nanotube-based digital vacuum electronics and miniature instrumentation for space exploration Carbon nanotube-based digital vacuum electronics and miniature instrumentation for space exploration

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010spie.7594e..23m&link_type=abstract

MOEMS and Miniaturized Systems IX. Edited by Schenk, Harald; Piyawattanametha, Wibool. Proceedings of the SPIE, Volume 7594, pp

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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.

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