Rotating spoke instabilities in a wall-less Hall thruster: Simulations
| Autor: | Sedina Tsikata, Lou Grimaud, Ralf Schneider, Stéphane Mazouffre, Konstantin Matyash |
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| Přispěvatelé: | Universität Greifswald - University of Greifswald, 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: |
010302 applied physics
Physics Electron density Quantitative Biology::Neurons and Cognition FOS: Physical sciences Electron Condensed Matter Physics 01 natural sciences Instability Physics - Plasma Physics 010305 fluids & plasmas Anode Core (optical fiber) Plasma Physics (physics.plasm-ph) [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph] Computer Science::Discrete Mathematics Physics::Plasma Physics Electric field Ionization 0103 physical sciences Atomic physics Diffusion (business) |
| Zdroj: | Plasma Sources Science and Technology Plasma Sources Science and Technology, IOP Publishing, 2019, 28 (4), pp.044002. ⟨10.1088/1361-6595/ab1236⟩ |
| ISSN: | 0963-0252 1361-6595 |
| Popis: | The low-frequency rotating plasma instability (spoke) in the ISCT200 thruster operating in the wall-less configuration was simulated with a 3 dimensional PIC MCC code. In the simulations an m = 1 spoke rotating with a velocity of 6.5 km/s in the ExB direction was observed. The rotating electron density structure in the spoke is accompanied by a strongly depleted region of the neutral gas, which clearly shows that the spoke instability is of an ionization nature, similar to the axial breathing mode oscillations. In the simulation the electron cross-field transport through the spoke core was caused by diffusion in the high-frequency (4-10 MHz), short-scale (3 mm) electric field oscillations. These short-scale oscillations play a crucial role in the thruster discharge as over 70% of the electron current to the anode originates from the spoke core. The rest of the current originates from the spoke front where the electron cross-field transport toward the anode is due to the ExB drift in the spoke macroscopic azimuthal electric field. Submitted to Plasma Sources Sci. Technol., 2019 |
| Databáze: | OpenAIRE |
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