Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Michael S. McDonald"'
Publikováno v:
AIAA SCITECH 2023 Forum.
Autor:
Marcel P. Georgin, Michael S. McDonald
Publikováno v:
AIAA Scitech 2021 Forum.
Autor:
Kevin L. Jensen, Michael S. McDonald, Mia K. Dhillon, Daniel Finkenstadt, Andrew Shabaev, Michael Osofsky
Publikováno v:
Journal of Vacuum Science & Technology B. 40:022801
Autor:
Michael S. McDonald, Marcel P. Georgin
Publikováno v:
Journal of Applied Physics. 130:203301
A generalized Ohm’s law, including nonclassical electron collisions, is evaluated with experimentally measured plasma properties to infer electron streamlines in a hollow cathode plume. The analysis of the transport equation shows that large radial
Publikováno v:
Journal of Propulsion and Power. 33:614-637
This article provides recommended methods for building, operating, and taking plasma potential measurements from electron-emitting probes in electric propulsion devices, including Hall thrusters, gridded ion engines, and others. The two major techniq
Autor:
Ioannis G. Mikellides, Dan R. Lev, Daniela Pedrini, Dan M. Goebel, Michael S. McDonald, Benjamin Jorns
Publikováno v:
Reviews of Modern Plasma Physics. 3
Electric thrusters are finding increasing usage worldwide in spacecraft applications. Significant progress has been made in recent years in the modeling and performance of thermionic hollow cathodes used in flight thrusters, such as Hall and ion thru
Autor:
Don Shiffler, Michael S. McDonald, John J. Petillo, Kevin L. Jensen, John R. Harris, Marc Cahay
Publikováno v:
Journal of Applied Physics. 126:245301
A methodology for implementing the recently developed reformulated general thermal-field equation describing simultaneous thermal and field emission contributions to electron emission is developed, with modifications directed to enhancing speed and a
Autor:
Nathan A. Moody, John J. Petillo, Aaron Jensen, Don Shiffler, Michael S. McDonald, Kevin L. Jensen, Oksana Chubenko, John R. Harris
Publikováno v:
Journal of Applied Physics. 125:234303
A methodology of modeling nonplanar surfaces, in which the microscale features of the emission sites can be orders of magnitude smaller than the mesoscale features defining the active emission area, has been developed and applied to both ordered arra
Publikováno v:
2013 IEEE Aerospace Conference.
High-power Hall thrusters capable of throughput on the order of 100 kW are currently under development, driven by more demanding mission profiles and rapid growth in on-orbit solar power generation capability. At these power levels the nested Hall th
Publikováno v:
2013 IEEE Aerospace Conference.
The plasma plume of a 6 kW Hall Effect Thruster (HET) has been investigated in order to determine time-averaged and time-resolved plasma properties in a 2-D plane. HETs are steady-state devices with a multitude of kilohertz and faster plasma oscillat