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Radiation dose testing on Juno high voltage cables

Show simple item record Green, Nelson W. Kirkham, Harold Kim, Wousik McAlpine, Bill 2010-08-09T22:08:51Z 2010-08-09T22:08:51Z 2008-12-30
dc.identifier.citation 47th AIAA Aerospace Sciences Meeting and Exhibit, Orlando, FL, 2008 en_US
dc.identifier.clearanceno 08-4947
dc.description.abstract The Juno mission to Jupiter will have a highly elliptical orbit taking the spacecraft through the radiation belts surrounding the planet. During these passes through the radiation belts, the spacecraft will be subject to high doses of radiation from energetic electrons and protons with energies ranging from 10 keV to 1 GeV. While shielding within the spacecraft main body will reduce the total absorbed dose to much of the spacecraft electronics, instruments and cables on the outside of the spacecraft will receive much higher levels of absorbed dose. In order to estimate the amount of degradation to two such cables, testing has been performed on two coaxial cables intended to provide high voltages to three of the instruments on Juno. Both cables were placed in a vacuum of 5x10-6 torr and cooled to -50°C prior to exposure to the radiation sources. Measurements of the coaxial capacitance per unit length and partial discharge noise floor indicate that increasing levels of radiation make measurable but acceptably small changes to the F EP Teflon utilized in the construction of these cables. In addition to the radiation dose testing, observations were made on the internal electrostatic charging characteristics of these cables and multiple discharges were recorded. en_US
dc.description.sponsorship NASA/JPL, American Institute of Aeronautics and Astronautics en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA: Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2008 en_US
dc.subject Juno en_US
dc.subject radiation en_US
dc.subject FEP en_US
dc.subject partial discharge en_US
dc.subject IESD en_US
dc.title Radiation dose testing on Juno high voltage cables en_US
dc.type Preprint en_US

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