Zobrazeno 1 - 10
of 27
pro vyhledávání: '"G. A. Jongeward"'
Autor:
G. A. Jongeward, Thomas W. Kerslake, Todd Schneider, D. Snyder, Todd Peterson, Ioannis G. Mikellides
Publikováno v:
Journal of Spacecraft and Rockets. 42:550-558
Solar array technologies that can empower electric thrusters in direct drive mode may provide significant mission benefits by reducing power processing, system complexity, weight, and cost over conventional systems. In direct-drive systems the solar
Autor:
Dale C. Ferguson, Ioannis G. Mikellides, Todd Schneider, G. A. Jongeward, Tom Kerslake, D. Snyder, T. P. Peterson
Publikováno v:
Journal of Spacecraft and Rockets. 42:543-549
The results from an experimental investigation to assess arcing during operation of high voltage solar arrays in a plasma environment are presented. The experiments were part of an effort to develop systems that would allow safe operation of Hall-Eff
Autor:
David L. Cooke, G. A. Jongeward, S.T. Lai, Barbara M. Gardner, K.P. Ray, Myron J. Mandell, L.H. Krause, R.A. Hilmer, V. A. Davis
Publikováno v:
Advances in Space Research. 36:2511-2515
Nascap-2k is the updated version of the NASCAP/GEO spacecraft charging analysis code. In addition to packaging the physical content of NASCAP/GEO in a modern way, Nascap-2k incorporates other plasma analysis codes (in particular, the DynaPAC code) in
Publikováno v:
Journal of Spacecraft and Rockets. 39:894-903
Hall-effect thruster flight measurements are compared with results from two-dimensional plume and three-dimensional spacecraft interactions computer simulations. The measurements were acquired onboard Express-A 2 and A 3,two Russian communications sa
Publikováno v:
Journal of Geophysical Research: Space Physics. 103:439-445
The Space Power Experiment Aboard Rockets (SPEAR) 3 experiment was launched on March 15, 1993, to test grounding devices for negative payloads. In this paper we review two aspects of the high-altitude flight data and compare them with preflight predi
Publikováno v:
Journal of Spacecraft and Rockets. 34:824-828
A hollow cathode-based plasma contactor will bee own on the international spacestation to control the station’ s potential to within 40 V of the local ionosphere. Extensive testing of the plasma contactor has been conducted in vacuum facilitiesat t
Publikováno v:
Measurement Techniques in Space Plasmas: Particles
Langmuir Probes are often used to determine plasma density and temperature. The relation between the current collected by a large spherical probe on a low-earth-orbit spacecraft and the environment parameters is different from the relation for such a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::33ba1f947681b1c66985c80280e5fa33
https://doi.org/10.1029/gm102p0037
https://doi.org/10.1029/gm102p0037
Publikováno v:
Journal of Spacecraft and Rockets. 31:54-59
An experimental and theoretical investigation of an expanding plasma generated by an arc produced by biasing a conductor underneath a thin layer of anodized aluminum 160-V negative of a laboratory plasma that can produce large peak arc currents by di
Publikováno v:
IEEE Transactions on Electrical Insulation. 25:367-370
The interactions between HV systems and the low-earth-orbit environment are reviewed. The mechanism responsible for the observed arcing on negatively biased solar arrays is discussed, and calculations of the plasma density dependence on the voltage t
Autor:
R. Joseph Cassady, Ioannis G. Mikellides, Todd Schneider, Todd Peterson, Dale C. Ferguson, G. A. Jongeward, Tom Kerslake, Daniel Homiak, D. Snyder, Andrew Hoskins
Publikováno v:
39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit.
The sta:us of development of a Direct Drive Ha!! Thruster System is presented. 13 the first part. a s:udy of the impacts to spacecraft systems and mass benefits of a direct-drive architecture is reviewed. The study initially examines four cases of SP