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Magnetic shield design modeling and validation for SWOT spacecraft Ka-band extended interaction Klystron

Show simple item record Gonzales, Edward Mcwatters, Dalia 2019-05-16T22:07:07Z 2019-05-16T22:07:07Z 2016-07-25
dc.identifier.citation 2016 IEEE International Symposium on Electromagnetic Compatibility, Ottawa, Canada, July 25-29, 2016 en_US
dc.identifier.clearanceno 16-1864
dc.description.abstract Two Extended Interaction Klystrons (EIKs) containing strong permanent magnets were modeled magnetically in a representative spacecraft geometry using commercial finite element modeling techniques and were validated against measurements made at varying distances. Initial modeling results for the 63 A-m2 dipole moment magnets showed that magnetic shields would be necessary in order to meet magnetic field requirements for the Surface Water and Ocean Topography (SWOT) spacecraft, which contains components that are susceptible to external DC magnetic fields. JPL and the EIK vendor proposed cold rolled steel and mu-metal as potential shield materials along with proposed thicknesses of 0.5 mm and 1.5 mm. Magnetic shields made from each of these materials were designed and modeled in software, taking high-field saturation into account. Prototype magnetic shields with these parameters were then built, measured with an existing EIK, and compared against modeling results. For single-axis field measurements along the dipole axis, modeling results were within 7 gauss of the measured values at 10 cm from the magnet, and converged to less than 1.5 gauss at distances greater than 14 cm from the magnet. Three-axis field measurements at locations of interest showed that model correlation improved to within 4 gauss at 11 cm and 2 gauss for distances ranging between 15 cm and 36 cm. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA: Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2016 en_US
dc.title Magnetic shield design modeling and validation for SWOT spacecraft Ka-band extended interaction Klystron en_US
dc.type Preprint en_US

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