+ Visit NASA.gov + Contact NASA   + Home Select Search Field * All Report - Patent Number Abstract *Accession Number *NASA Center *Author NameDocument IDKeywordsPublication Date *Title * Find Results With All of the words At least one of the words Enter Search Term  within returned results    Search Tips: Use only the fields with * to search NIX collection. Enclose terms in double quotation marks (") to search for exact phrases, ie: "space shuttle". NOTE: Commas and dashes are removed from search term by search engine. Select Reset Search button to start a new search. See Help for more tips. + NASA Center + Publication Year + Subject + Availability Options + Item/Media Type Selected Navigations: Author > Aston, G. [x] Sort results by: NASA Center | Date Added to NTRS | Publication Year There are a total of 31 record(s) matching your query. Sorted by: Date Added To NTRS in Descending order Prev 1 2 3 4 Next  Hollow cathode startup using a microplasma discharge Author(s): Aston, G. Abstract: Attention is given to a microplasma discharge to initiate a hollow cathode discharge for such applications as plasma flow experiments, the electric propulsion of space vehicles, and as a replacement for filament cathodes in ... NASA Center: Jet Propulsion Laboratory Publication Year: 1981 Added to NTRS: 2004-11-03 Accession Number: 82A13775; Document ID: 19820030240 Electric propulsion - A far reaching technology Author(s): Aston, G. Abstract: It is shown that a starprobe could be built to perform a flyby mission to Proxima Centauri in approximately 400 years. This vehicle would use familiar fission nuclear reactor and ion propulsion system technologies to achieve ... NASA Center: Jet Propulsion Laboratory Publication Year: 1985 Added to NTRS: 2004-11-03 Accession Number: 86A17837; Document ID: 19860033099; Report Number: AIAA PAPER 85-2028 Ion extraction from a plasma Author(s): Aston, G.; Wilbur, P. J. Abstract: The physical processes governing ion extraction from a plasma have been examined experimentally. The screen hole plasma sheath (the transition region wherein significant ion acceleration and complete electron retardation ... NASA Center: Jet Propulsion Laboratory Publication Year: 1981 Added to NTRS: 2004-11-03 Accession Number: 81A37094; Document ID: 19810052690 Pulsed plasma thruster ignitor plug ignition characteristics Author(s): Brady, M. E.; Aston, G. Abstract: Previously cited in issue 15, p. 2361, Accession no. A82-31913 NASA Center: Jet Propulsion Laboratory Publication Year: 1983 Added to NTRS: 2004-11-03 Accession Number: 83A48131; Document ID: 19830066913 Ion accelerator systems for high-power 30-cm thruster operation Author(s): Aston, G. Abstract: No Abstract Available NASA Center: Jet Propulsion Laboratory Publication Year: 1985 Added to NTRS: 2004-11-03 Accession Number: 85A21837; Document ID: 19850039686 Ion propulsion technology requirements for planetary mission applications Author(s): Aston, G. Abstract: Integrating a clustered, four engine ion propulsion system to the Mariner Mark II spacecraft is shown to reduce total trip time for the five proposed Mariner Mark II missions by fifteen years. In addition, this advanced ... NASA Center: Jet Propulsion Laboratory Publication Year: 1985 Added to NTRS: 2004-11-03 Accession Number: 86A13833; Document ID: 19860029095; Report Number: AIAA PAPER 85-2000 Lunar Get Away Special (GAS) spacecraft Author(s): Nock, K. T.; Aston, G.; Salazar, R. P.; Stella, P. M. Abstract: A new approach to the resumption of Lunar missions is discussed which relies upon Shuttle Get-Away-Special Canisters for launch and solar electric ion propulsion for slow orbit transfer to low Lunar orbit. The technique of ... NASA Center: Jet Propulsion Laboratory Publication Year: 1987 Added to NTRS: 2004-11-03 Accession Number: 87A39632; Document ID: 19870052358; Report Number: AIAA PAPER 87-1051 NASA electric propulsion technology Author(s): Berkopec, F. D.; Stone, J. R.; Aston, G. Abstract: It is pointed out that the requirements for future electric propulsion cover an extremely large range of technical and programmatic characteristics. A NASA program is to provide options for the many potential mission ... NASA Center: Glenn Research Center, Jet Propulsion Laboratory Publication Year: 1985 Added to NTRS: 2004-11-03 Accession Number: 86A17831; Document ID: 19860033093; Report Number: AIAA PAPER 85-1999 The ion-optics of a two-grid electron-bombardment thruster Author(s): Aston, G. Abstract: A detailed experimental investigation was performed to determine the ion-optical performance of an electron-bombardment ion thruster as a function of grid geometry changes. The results show that each geometrical grid ... NASA Center: NASA (non Center Specific) Publication Year: 1976 Added to NTRS: 2004-11-03 Accession Number: 76N23356; Document ID: 19760016268; Report Number: NASA-CR-135034 Ferm cathode operation in the test bed ion engine Author(s): Aston, G. Abstract: A rapid start hollow cathode has been developed for high power ion thruster application. Using no low work function insert or heater, the Field Enhanced Refractory Metal (FERM) cathode electron emission occurs from a ... NASA Center: Jet Propulsion Laboratory Publication Year: 1984 Added to NTRS: 2004-11-03 Accession Number: 85A16453; Document ID: 19850034302 Prev 1 2 3 4 Next  + Back to Top + Sponsored by the NASA Scientific and Technical    Information Program + 2004 Vision for Space Exploration + Freedom of Information Act + NASA Web Privacy Policy and Important Notices + NASA Disclaimers, Copyright Notice,    and Terms and Conditions of Use NASA Official: Calvin Mackey Page Curator: NASA Center for AeroSpace Information (help@sti.nasa.gov) Last Updated: July 5, 2007