J
John T. Yim
Researcher at Glenn Research Center
Publications - 40
Citations - 525
John T. Yim is an academic researcher from Glenn Research Center. The author has contributed to research in topics: Electrically powered spacecraft propulsion & Ion thruster. The author has an hindex of 13, co-authored 39 publications receiving 454 citations.
Papers
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Journal ArticleDOI
Recommended Practice for Pressure Measurements and Calculation of Effective Pumping Speeds during Electric Propulsion Testing
TL;DR: In this article, a recommended practice for making pressure measurements, pressure diagnostics, and calculating effective pumping speeds with justification is presented, along with a recommended procedure for measuring the effective pumping speed with justification.
Proceedings ArticleDOI
NASA HERMeS Hall Thruster Electrical Configuration Characterization
Peter Y. Peterson,Hani Kamhawi,Wensheng Huang,John T. Yim,Daniel A. Herman,George J. Williams,James H. Gilland,Richard R. Hofer +7 more
TL;DR: In this article, electrical configuration testing of the NASA Hall Effect Rocket with Magnetic Shielding (HERMeS) TDU-1 Hall thruster in NASA Glenn Research Center's Vacuum Facility 5.
Proceedings ArticleDOI
Performance, Facility Pressure Effects, and Stability Characterization Tests of NASA's Hall Effect Rocket with Magnetic Shielding Thruster
Hani Kamhawi,Wensheng Huang,Thomas W. Haag,John T. Yim,Daniel A. Herman,George J. Williams,James H. Gilland,Peter Y. Peterson,Richard R. Hofer,Ioannis G. Mikellides +9 more
TL;DR: In this paper, the Hall Effect Rocket with Magnetic Shielding (HERMeS) 12.5 kW Technology Demonstration Unit-1 (TDU-1) has been the subject of extensive technology maturation in preparation for flight system development.
Proceedings ArticleDOI
Overview of the Development of the Solar Electric Propulsion Technology Demonstration Mission 12.5-kW Hall Thruster
Hani Kamhawi,Wensheng Huang,Thomas W. Haag,John T. Yim,Li Chang,Lauren Clayman,Daniel A. Herman,Rohit Shastry,Robert E. Thomas,Timothy R. Verhey,Christopher Griffith,James L. Myers,George J. Williams,Ioannis G. Mikellides,Richard R. Hofer,James E. Polk,Dan M. Goebel +16 more
TL;DR: In this paper, the design attributes of the Hall thruster that was collaboratively developed by the NASA Glenn Research Center and the Jet Propulsion Laboratory are presented, as well as the results of the functional tests that have been carried out to date.
Proceedings ArticleDOI
Characterization of Vacuum Facility Background Gas Through Simulation and Considerations for Electric Propulsion Ground Testing
John T. Yim,Jonathan M. Burt +1 more
TL;DR: In this article, the background gas in a vacuum facility for electric propulsion ground testing is examined in detail through a series of cold flow simulations using a direct simulation Monte Carlo (DSMC) code.