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dc.contributor.advisorOlsen,Chris
dc.contributor.authorGant, Dean Alan
dc.date.accessioned2013-02-15T23:30:32Z
dc.date.available2013-02-15T23:30:32Z
dc.date.issued1991-12
dc.identifier.urihttp://hdl.handle.net/10945/28043
dc.descriptionApproved for public release; distribution is unlimiteden_US
dc.description.abstractLithium, Potassium, and Cesium ion sources have been studied using devices based on thermal emission from a Beta- Eucryptite structure as possible ion sources for use in satellite charge control. The experiments evaluated the power requirements of the different ion emitters to produce approximately 10(mA) of current and tested the effects of using an Osmium-Ruthenium coating to increase the work function of the emitter surface. Lifetime tests of the different ion emitters were also performed. Analysis of the experimental findings showed that Lithium ion sources with a lifetime of 93 hours and Potassium ion sources with a lifetime of 44 hours produced acceptable current levels for use in spacecraft charge control devices. Potassium sources produced the necessary current, 10(mA), at 140°(C) lower temperature than the Lithium sources. All of the coated sources produced wildly fluctuating currents at the 10(jiA) level and were not acceptable for the purpose intended.en_US
dc.description.urihttp://archive.org/details/comparisonofalka00gant
dc.format.extent86 p.;28 cm.en_US
dc.language.isoen_US
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.titleComparison of alkali ion emitters.en_US
dc.typeThesisen_US
dc.contributor.secondreaderHeinz, O.
dc.contributor.corporateNaval Postgraduate School
dc.contributor.schoolNaval Postgraduate School
dc.contributor.departmentPhysics
dc.subject.authoralkali ion emittersen_US
dc.description.serviceCaptain, United States Armyen_US
etd.thesisdegree.nameM.S. in Physicsen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplinePhysicsen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US


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