Stability of Ion Flow and Role of Boundary Conditions in a Simplified Model of the E × B Plasma Accelerator with a Uniform Electron Mobility

Romadanov, Ivan; Smolyakov, Andrei; Sorokina, E. A.; Andreev, V. V.; Marusov, N. A.

doi:10.1134/s1063780x20040108

Cited by 7 publications

(2 citation statements)

References 36 publications

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“…As it was shown in 18,42 the constraints indeed define the stability of the resulting profile and characteristic frequency of the breathing mode.…”

Section: A Full Self-consistent Modelmentioning

confidence: 68%

On the mechanism of ionization oscillations in Hall thrusters

Chapurin,

Smolyakov,

Hagelaar

et al. 2021

Preprint

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“…As it was shown in 18,42 the constraints indeed define the stability of the resulting profile and characteristic frequency of the breathing mode.…”

Section: A Full Self-consistent Modelmentioning

confidence: 68%

On the mechanism of ionization oscillations in Hall thrusters

Chapurin,

Smolyakov,

Hagelaar

et al. 2021

Preprint

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“…A regular smooth solution across the whole acceleration region from v i < c s to the region with v i > c s by imposing the regularity condition at the sonic point 25,26 . As an example, in case of the ion acceleration in the Hall thrusters, the regular solution is obtained by imposing an analytical condition on the ion flux, electron current and ionization source, eventually, defining the operational diagram for the Hall thruster discharge 27,28 .…”

mentioning

confidence: 99%

On Quasineutral Plasma Flow in the Magnetic Nozzle

Smolyakov,

Sabo,

Yushmanov

et al. 2021

Preprint

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Exact solutions for quasineutral plasma acceleration of magnetized plasma in the paraxial magnetic nozzle are obtained. It is shown that the non-monotonic magnetic field with a local maximum of the magnetic field is a necessary condition for the formation of the quasineutral accelerating potential structure. A global nature of the accelerating potential that occurs as a result of the constraint due to the regularity condition at the sonic point is emphasized and properties of such solutions are discussed for the case of general polytropic equation of state for electrons.

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Experimental characterization of Hall thruster breathing mode dynamics

Dale

Jorns

2021

Journal of Applied Physics

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The dynamic properties of the Hall thruster breathing mode are investigated experimentally. Non-invasive time-resolved laser diagnostics are combined with a quasi-one-dimensional non-Maxwellian modeling technique to yield the high-speed evolution of a variety of plasma properties over the course of a breathing oscillation. The fluctuations of both ion and neutral densities are quantified in terms of amplitude and dispersion and are interpreted in the context of a simplified dispersion relation. It is found that the oscillations associated with the breathing mode are likely ion and neutral waves propagating with phase velocities commensurate with the local species drift speed. Further, the amplitudes of the waves are shown to decay with distance from the anode. This effect can be explained largely by the influence of the expansion of the background plasma and neutral gas. This monotonic decay combined with the downstream propagating nature of the waves suggests that these oscillations are influenced by conditions upstream of the acceleration and ionization regions. By comparing the presence of these waves to inferred electron temperature fluctuations, the hypothesis that the breathing mode is governed by a process in which the modulation of the neutral density near the anode sheath or the anode itself is coupled to a downstream ionization instability is qualitatively explored. The possibility of these waves relating to cyclical recombination of ions at the anode is also discussed.

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Stability of Ion Flow and Role of Boundary Conditions in a Simplified Model of the E × B Plasma Accelerator with a Uniform Electron Mobility

Cited by 7 publications

References 36 publications

On the mechanism of ionization oscillations in Hall thrusters

On the mechanism of ionization oscillations in Hall thrusters

On Quasineutral Plasma Flow in the Magnetic Nozzle

Experimental characterization of Hall thruster breathing mode dynamics

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