Anode geometry influence on LaB 6 cathode discharge characteristics
| Autor: | Lou Grimaud, Romain Joussot, Stéphane Mazouffre, George Potrivitu |
|---|---|
| Přispěvatelé: | Institut de Combustion, Aérothermique, Réactivité et Environnement (ICARE), Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut des Sciences de l'Ingénierie et des Systèmes (INSIS) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Physics of Plasmas Physics of Plasmas, American Institute of Physics, 2019, 26 (11), pp.113506. ⟨10.1063/1.5115834⟩ |
| ISSN: | 1070-664X 1089-7674 |
| Popis: | The characterization of an electric propulsion device cathode is performed in the so-called diode configuration with an external anode. The anode acts as a physical boundary for the cathode plasma discharge; therefore, it influences cathode operation and performances. In this study, four different anodes—namely, a disk, a plate, a long cylinder, and a short cylinder—have been used with a flat disk LaB6 emitter 5 A-class cathode to examine the anode geometry impact on cathode discharge properties. Current–voltage curves, discharge oscillations, electron parameters, and ion velocities have been measured for currents in the 2 A to 12 A range and xenon mass flow rates varied from 0.4 mg/s to 1 mg/s with a fixed cathode-to-anode distance. The set of results clearly supports the fact that the anode geometry strongly influences the cathode characteristics both at the macroscopic and the microscopic scale. |
| Databáze: | OpenAIRE |
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