NDLI: Electron transport and ion acceleration in a low-power cylindrical Hall thruster

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Electron transport and ion acceleration in a low-power cylindrical Hall thruster

Content Provider	CiteSeerX
Author	Smirnov, A. Raitses, Y. Fisch, N. J.
Description	Conventional annular Hall thrusters become inefficient when scaled to low power. Cylindrical Hall thrusters, which have lower surface-to-volume ratio, are therefore more promising for scaling down. They presently exhibit performance comparable with conventional annular Hall thrusters. Electron cross-field transport and ion acceleration in a 2.6 cm miniaturized cylindrical Hall thruster (100 W power level) are studied through the analysis of experimental data and Monte Carlo simulations of electron and ion dynamics in the thruster channel. The numerical model takes into account elastic and inelastic electron collisions with atoms, electron-wall collisions, including secondary electron emission, and Bohm diffusion. We show that in order to explain the observed discharge current, the electron anomalous collision frequency νB has to be on the order of the Bohm value, νB≈ωc/16. The contribution of electron-wall collisions to cross-field transport is found to be insignificant. The plasma density peak observed at the axis of the 2.6 cm cylindrical Hall thruster is likely to be due to the convergent flux of ions, which are born in the annular part of the channel and accelerated towards the thruster axis. in Proc. 40th IAA/ASME/SAE/ASEE Joint Propulsion Conf., Fort Lauderdale, FL, 2004, AIAA paper
File Format	PDF
Language	English
Access Restriction	Open
Subject Keyword	Electron Transport Bohm Value Cross-field Transport Numerical Model Bohm Diffusion Low-power Cylindrical Hall Thruster Thruster Axis Monte Carlo Simulation Conventional Annular Hall Low Power Thruster Channel Observed Discharge Plasma Density Peak Ion Acceleration Cm Cylindrical Hall Thruster Ion Dynamic Power Level Secondary Electron Emission Inelastic Electron Collision Annular Part Surface-to-volume Ratio Electron Cross-field Transport Electron Anomalous Collision Frequency Cylindrical Hall Thruster Electron-wall Collision Experimental Data Convergent Flux Conventional Annular Hall Thruster
Content Type	Text
Resource Type	Article

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