Nonlinear regimes of the electron cyclotron drift instability in Vlasov simulations

Tavassoli, Arash; Smolyakov, Andrei; Shoucri, M.; Spiteri, Raymond J.

doi:10.1063/5.0083081

Cited by 8 publications

(2 citation statements)

References 43 publications

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“…In practice, quantifying these effects requires an understanding of the growth rate-the rate at which the EDI extracts momentum from the background plasmaand the power spectrum-the distribution of energy in the waves as a function of frequency and lengthscale [14]. While there are many theories for these aspects of the EDI [4,[15][16][17][18][19], there has yet to be a direct experimental measurement of the linear growth and nonlinear wave coupling processes that govern the EDI spectrum. This lack of experimental data speaks to a broader problem commonly encountered in measuring wave dynamics in low temperature plasmas [5]: established methods based on length-scale bispectral analysis [20,21], developed for higher energy density plasmas, do not translate well to space-based and low temperature systems.…”

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confidence: 99%

Growth and Saturation of the Electron Drift Instability in a Crossed Field Plasma

Brown

Jorns

2023

Phys. Rev. Lett.

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The linear growth and nonlinear energy transfer of the electron drift instability (EDI) are experimentally measured in the plume of a low-temperature, Hall effect discharge. A frequency-based bispectral analysis technique applied to fast ion density fluctuation measurements shows a growth rate function that is qualitatively similar to predictions from the linear instability dispersion relation, but an order of magnitude smaller. Calculation of the nonlinear transfer function indicates multiple three-wave interactions between high-frequency resonances of the instability in addition to an inverse energy cascade towards lower-frequency modes. These results are discussed in the context of recent theoretical, numerical, and experimental efforts on the EDI in Hall effect discharges and how the EDI may impact anomalous cross-field transport.

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confidence: 99%

Growth and Saturation of the Electron Drift Instability in a Crossed Field Plasma

Brown

Jorns

2023

Phys. Rev. Lett.

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“…It is clear that EDI shows different characteristics in each growth stage due to different excitation mechanisms. Tavassoli et al [22] showed that in numerical simulation studies of EDI, numerical noise often significantly affects the simulation results and obscures the actual growth mechanisms at each stage. Asadi et al [23] showed that increasing the number of macro-particles in the model can eliminate the numerical noise to some extent.…”

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confidence: 99%

Growth mechanism and characteristics of electron drift instability in Hall thruster with different propellant types

Chen 陈,

Kan 阚,

Gao 高

et al. 2024

Chinese Phys. B

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The existence of a significant electron drift instability (EDI) in the Hall thruster is considered one of the possible causes of the abnormal increase in axial electron mobility near the outlet of the channel. In recent years, extensive simulation studies have been conducted to investigate the characteristics of EDI, but the excitation and growth mechanisms of EDI in both linear and nonlinear stages are unclear. In this work, a one-dimensional PIC model on the azimuthal direction of the thruster near-exit region is established to gain further insights into the mechanism of the EDI in detail, and the effects of different types of propellants on EDI characteristics are discussed. The changes in axial electron transport caused by EDI under different types of propellants and electromagnetic field strengths are also examined. The results indicate that EDI undergoes a short linear growth phase before transitioning to the nonlinear phase and finally reaching saturation through the ion Landau damping. EDI drives a significant ion heating in the azimuthal direction through electron-ion friction before entering the quasi-steady state which increases the axial mobility of the electrons. Applying propellants with lighter atomic weight can effectively suppress the oscillation amplitude of EDI, but increases the linear growth rate of EDI as well as the frequency and phase velocity. The axial electron mobility increased under the EDI by three orders of magnitude compared to the classical mobility, this simulated result obtained are consistent with experimental phenomena. The change in the type of propellant is not sufficient to significantly alter the electron axial mobility. It’s also found that collisions between electrons and neutral gases have a significant impact on electron axial mobility under the influence of EDI, increasing the strength of the electric field and decreasing the strength of the magnetic field both effectively suppress the axial transport of electrons.

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Beyond Strang: a Practical Assessment of Some Second-Order 3-Splitting Methods

Spiteri,

Tavassoli,

Wei

et al. 2023

Commun. Appl. Math. Comput.

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Nonlinear regimes of the electron cyclotron drift instability in Vlasov simulations

Cited by 8 publications

References 43 publications

Growth and Saturation of the Electron Drift Instability in a Crossed Field Plasma

Growth and Saturation of the Electron Drift Instability in a Crossed Field Plasma

Growth mechanism and characteristics of electron drift instability in Hall thruster with different propellant types

Beyond Strang: a Practical Assessment of Some Second-Order 3-Splitting Methods

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