NASA LogoNTRSNTRS - NASA Technical Reports ServerSearchmore_vertCollectionsAboutNewsHelpLogin Back to ResultsIn-situ Diagnostic for Assessing Hall Thruster WearThe design of a new diagnostic to measure the net erosion of Hall thruster surfaces is presented. This diagnostic consists of a pair of optical noncontact profilometer pens mounted to a set of motion stages, which can interrogate the surface features of multiple components of interest including the hollow cathode assembly, magnet front pole covers, and discharge channel. By comparing scans of these surfaces to reference features, estimates of the component erosion rates can be acquired throughout long-duration lifetime tests without venting and removing the thruster from the vacuum facility for external profilometry. This work presents a detailed overview of the diagnostic design including the precision positioning system. In addition, preliminary data are shown which verify diagnostic operation and establish a baseline that will be used to track the erosion of the Hall Effect Rocket with Magnetic Shielding (HERMeS) Technology Demonstration Unit 3 (TDU-3) during an ongoing long-duration wear test.Document ID20180007205Acquisition SourceGlenn Research CenterDocument TypeTechnical Memorandum (TM)AuthorsAhern, Drew M.*(NASA Glenn Research Center Cleveland, OH, United States)*Frieman, Jason D.*(NASA Glenn Research Center Cleveland, OH, United States)*Williams, George J.*(NASA Glenn Research Center Cleveland, OH, United States)*Mackey, Jonathan A.*(NASA Glenn Research Center Cleveland, OH, United States)*Haag, Thomas W.*(NASA Glenn Research Center Cleveland, OH, United States)*Huang, Wensheng*(NASA Glenn Research Center Cleveland, OH, United States)*Kamhawi, Hani*(NASA Glenn Research Center Cleveland, OH, United States)*Herman, Daniel A.*(NASA Glenn Research Center Cleveland, OH, United States)*Peterson, Peter Y.*(Vantage Partners, LLC Brook Park, OH, United States)*Gilland, James H.*(Ohio Aerospace Inst. Brook Park, OH, United States)*Hofer, Richard R.*(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)*Date AcquiredOctober 30, 2018Publication DateOctober 1, 2018Subject CategorySpacecraft Propulsion And PowerReport/Patent NumberE-19571AIAA-2018-4721GRC-E-DAA-TN59234NASA/TM-2018-219961Meeting InformationMeeting: Joint Propulsion ConferenceLocation: Cincinnati, OHCountry: United StatesStart Date: July 9, 2018End Date: July 11, 2018Sponsors:SAE International,American Inst. of Aeronautics and Astronautics,American Society for Engineering Education (ASEE)Funding Number(s)CONTRACT_GRANT: NNC12BA01BWBS: WBS 729200.01.03Distribution LimitsPublicCopyrightPublic Use Permitted.Available DownloadsNameType20180007205.pdfSTIcloud_downloadcontent_copyvisibilityRelated RecordsIDRelationTitle20180007417See AlsoIn-Situ Diagnostic for Assessing Hall Thruster Wear20180005344See AlsoIn-Situ Diagnostic for Assessing Hall Thruster Wearvisibility_offNo Preview Available
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