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Compact high current rare-earth emitter hollow cathode for hall effect thrusters
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Copyright Year | 2012 |
| Description | An apparatus and method for achieving an efficient central cathode in a Hall effect thruster is disclosed. A hollow insert disposed inside the end of a hollow conductive cathode comprises a rare-earth element and energized to emit electrons from an inner surface. The cathode employs an end opening having an area at least as large as the internal cross sectional area of the rare earth insert to enhance throughput from the cathode end. In addition, the cathode employs a high aspect ratio geometry based on the cathode length to width which mitigates heat transfer from the end. A gas flow through the cathode and insert may be impinged by the emitted electrons to yield a plasma. One or more optional auxiliary gas feeds may also be employed between the cathode and keeper wall and external to the keeper near the outlet. |
| File Size | 1785535 |
| Page Count | 23 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20120003730 |
| Archival Resource Key | ark:/13960/t24b82p8q |
| Language | English |
| Publisher Date | 2012-03-27 |
| Access Restriction | Open |
| Subject Keyword | Spacecraft Propulsion And Power Electric Propulsion Patents Hollow Cathodes Plasma Engines Rare Earth Elements Plasmas Physics Lanthanum Compounds Hall Effect Thrustors Electrons Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Patent |
