Hydrodynamic simulation of a stationary plasma thruster in steady state regime

Mirshams, Mehran; Shokri, Babak; Alavi, S. Kh.; Moradi, Mahmoud; Azimipanah, A.

doi:10.1016/j.ast.2009.06.008

Cited by 6 publications

(3 citation statements)

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“…As the magnetic field changes from inward deflection to outward deflection, R Δ increases gradually and reduces the characteristic frequency of ion acceleration on the rhs of equation ( 13). Meanwhile, higher electron temperature promotes ionization on the lhs of equation (13). They both improve the stable discharge condition and the oscillations in figure 12 are manifested to be suppressed.…”

Section: Discharge Oscillationsmentioning

confidence: 97%

“…Equation (12) shows the stable discharge condition, which reveals that the maximum ion production rate is faster than the characteristic rate for ions to flow out of the channel in equation (13). As the magnetic field changes from inward deflection to outward deflection, R Δ increases gradually and reduces the characteristic frequency of ion acceleration on the rhs of equation ( 13).…”

Section: Discharge Oscillationsmentioning

confidence: 98%

“…Dominated by orthogonal electric and magnetic fields, the plasma in Hall thrusters is assumed such that electrons are magnetized while ions are not. The magnetic field strength and topology affect the density and energy distribution of electrons, influencing the ionization process and the distribution of the electric field directly [13,14]. The behavior of plasma there affects the discharge mode (or called current oscillation mode), beam extraction, thruster performance, and erosion of the channel wall.…”

Section: Introductionmentioning

confidence: 99%

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Magnetic field deflection in a 100 W Hall thruster with permanent magnets

Zhang

Ren

Tang

et al. 2022

Plasma Sources Sci. Technol.

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The compact structure restrains the application of magnetic shielding in low-power Hall thrusters, leading to an asymmetric magnetic field or partial magnetic shielding of the channel wall. This study employs a trim coil to implement an asymmetric magnetic configuration in a 100 W laboratory Hall thruster. The locations of the maximum curvature of magnetic lines are deflected toward the inner and outer channel wall corresponding to the inward and outward deflected magnetic field configurations. Effects of the magnetic field deflection on the position of the ionization zone, efficiency of the thruster, discharge oscillations, and wall erosion are studied. Optical imaging and electrostatic probes are employed to monitor and scan the plasma beam. Experimental results show that the outward deflection induces a change in the magnetic mirror effect and alters the location of the ionization zone. The radial movement of the ionization zone away from the inner channel wall decreases the near-wall conductivity, reducing the election current by 13.5% and promoting the current efficiency. Discharge oscillations are suppressed, and the propellant utilization efficiency is improved by 8.2%. Erosion of the channel wall shows an improvement of 40%. Generally, an outward deflected magnetic configuration can significantly improve the performance of low-power Hall thrusters.

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Section: Discharge Oscillationsmentioning

confidence: 97%

Section: Discharge Oscillationsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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