4.6 Article

Stationary axial model of the Hall thruster plasma discharge: electron azimuthal inertia and far plume effects

Related references

Note: Only part of the references are listed.
Article Physics, Applied

Time-dependent axial fluid model of the Hall thruster discharge and its plume

D. Poli et al.

Summary: The standard time-dependent three-fluid model is enhanced by adding physics and improving modeling of certain physical phenomena. The added physics has a significant impact on both the dynamics of the breathing mode and the time-averaged response of the plasma.

JOURNAL OF PHYSICS D-APPLIED PHYSICS (2023)

Article Physics, Applied

Hybrid plasma simulations of a magnetically shielded Hall thruster

J. Pereles-Diaz et al.

Summary: Numerical simulations of a magnetically shielded Hall effect thruster with a centrally mounted cathode are described and discussed, focusing on the impact of magnetic configuration and central cathode on plasma behavior. Magnetic shielding significantly reduces energy fluxes, decreases heat loads, and minimizes wall erosion. Injection of neutrals at the central cathode facilitates electron drift and magnetic topology efficiently channels electron current away from lateral walls.

JOURNAL OF APPLIED PHYSICS (2022)

Article Physics, Applied

Fluid and hybrid simulations of the ionization instabilities in Hall thruster

O. Chapurin et al.

Summary: Low-frequency axial oscillations in the range of 5-50 kHz are commonly observed in Hall thrusters. The exact mechanisms of these instabilities are not yet clear. Researchers have developed a one-dimensional time-dependent full nonlinear low-frequency model to study the physics of these oscillations. The model is compared to a hybrid model with kinetic ions and neutrals. It is found that both models exhibit two main regimes: one with pure low-frequency behavior and the other with coexisting low-frequency and high-frequency (100-200 kHz) oscillations. The effect of injecting neutrals with finite temperature is also studied, showing a significant suppression effect on the oscillation amplitude.

JOURNAL OF APPLIED PHYSICS (2022)

Article Physics, Fluids & Plasmas

Axial-azimuthal, high-frequency modes from global linear-stability model of a Hall thruster

Enrique Bello-Benitez et al.

Summary: The axial-azimuthal instabilities of a Hall-thruster plasma discharge were investigated using a fluid model and linear global stability approach. The analysis identified two main instability types, one developing near the plume and the other near the anode, with different frequency ranges and azimuthal mode numbers. The impact of various factors on these instabilities, such as design parameters, electric connections, and temperature perturbations, was also considered.

PLASMA SOURCES SCIENCE & TECHNOLOGY (2021)

Article Physics, Applied

The origin of the breathing mode in Hall thrusters and its stabilization

T. Lafleur et al.

Summary: The formation of the breathing mode in Hall thrusters is attributed to an ionization instability related to nonlinearity in electron power absorption, where an increase in plasma density enhances the electric field causing a positive feedback mechanism. This results in sustained plasma growth until neutral density decreases to a point where reignition is needed for the process to repeat. A carefully designed external circuit can be used to stabilize the discharge by counteracting the change in axial electric field.

JOURNAL OF APPLIED PHYSICS (2021)

Article Physics, Fluids & Plasmas

Local analysis of electrostatic modes in a two-fluid E x B plasma

J. J. Ramos et al.

Summary: This study presents a local investigation of linear electrostatic modes in plasmas with crossed electric and magnetic fields, utilizing a two-fluid model with finite-electron-gyroradius effects. The derived comprehensive dispersion relation covers various parametric regimes, describing different instabilities such as two-stream, drift-gradient, and drift-dissipative instabilities depending on conditions like drift velocities and equilibrium inhomogeneities. Instability thresholds are determined and distinctive unstable modes are analytically described.

PHYSICS OF PLASMAS (2021)

Article Engineering, Aerospace

Numerical and Experimental Investigation of Longitudinal Oscillations in Hall Thrusters

Vittorio Giannetti et al.

Summary: This paper presents a synergic experimental and numerical investigation of the breathing mode in a 5 kW-class Hall thruster. The calibrated model can predict the spatio-temporal distributions of the plasma properties with reasonable accuracy based on the discharge current signal. The augmented data obtained through the combination of experiments and calibrated model provides insights into the breathing mode oscillations and the evolution of plasma properties.

AEROSPACE (2021)

Article Physics, Fluids & Plasmas

Full fluid moment model for low temperature magnetized plasmas

Rupali Sahu et al.

PHYSICS OF PLASMAS (2020)

Article Physics, Fluids & Plasmas

An overview of discharge plasma modeling for Hall effect thrusters

Kentaro Hara

PLASMA SOURCES SCIENCE & TECHNOLOGY (2019)

Article Physics, Fluids & Plasmas

Effects of finite electron temperature on gradient drift instabilities in partially magnetized plasmas

V. P. Lakhin et al.

PHYSICS OF PLASMAS (2018)

Article Physics, Fluids & Plasmas

Ionization oscillations in Hall accelerators

S. Barral et al.

PHYSICS OF PLASMAS (2010)

Article Physics, Fluids & Plasmas

Low-frequency model of breathing oscillations in Hall discharges

Serge Barral et al.

PHYSICAL REVIEW E (2009)

Article Physics, Fluids & Plasmas

Low-Frequency Instability in Near-Anode Region of Hall Thruster

Alexander Kapulkin et al.

IEEE TRANSACTIONS ON PLASMA SCIENCE (2008)

Article Physics, Fluids & Plasmas

Shear-Based Model for Electron Transport in Hybrid Hall Thruster Simulations

Michelle K. Scharfe et al.

IEEE TRANSACTIONS ON PLASMA SCIENCE (2008)

Article Physics, Fluids & Plasmas

Fluid theory of magnetized plasma dynamics at low collisionality

J. J. Ramos

PHYSICS OF PLASMAS (2007)

Article Physics, Fluids & Plasmas

General expression of the gyroviscous force

JJ Ramos

PHYSICS OF PLASMAS (2005)

Article Physics, Applied

Vanishing of the negative anode sheath in a Hall thruster

E Ahedo et al.

JOURNAL OF APPLIED PHYSICS (2005)

Article Physics, Applied

A model of the two-stage Hall thruster discharge

E Ahedo et al.

JOURNAL OF APPLIED PHYSICS (2005)

Article Physics, Fluids & Plasmas

Transit-time instability in Hall thrusters

S Barral et al.

PHYSICS OF PLASMAS (2005)

Article Physics, Fluids & Plasmas

Fluid formalism for collisionless magnetized plasmas

JJ Ramos

PHYSICS OF PLASMAS (2005)

Article Physics, Fluids & Plasmas

Rayleigh instability in Hall thrusters

AA Litvak et al.

PHYSICS OF PLASMAS (2004)

Article Physics, Applied

Effect of anode dielectric coating on Hall thruster operation

L Dorf et al.

APPLIED PHYSICS LETTERS (2004)

Article Physics, Applied

Influence of design and operation parameters on Hall thruster performances

E Ahedo et al.

JOURNAL OF APPLIED PHYSICS (2004)

Article Physics, Fluids & Plasmas

Wall material effects in stationary plasma thrusters. II. Near-wall and in-wall conductivity

S Barral et al.

PHYSICS OF PLASMAS (2003)

Article Physics, Fluids & Plasmas

Effects of the radial plasma-wall interaction on the Hall thruster discharge

E Ahedo et al.

PHYSICS OF PLASMAS (2003)

Article Physics, Fluids & Plasmas

Presheath/sheath model with secondary electron emission from two parallel walls

E Ahedo

PHYSICS OF PLASMAS (2002)

Article Physics, Fluids & Plasmas

Model of the plasma discharge in a Hall thruster with heat conduction

E Ahedo et al.

PHYSICS OF PLASMAS (2002)

Article Physics, Fluids & Plasmas

Radial macroscopic model of a plasma flowing along annular dielectric walls

E Ahedo

PHYSICS OF PLASMAS (2002)

Article Physics, Fluids & Plasmas

Considerations on the role of the Hall current in a laboratory-model thruster

JM Haas et al.

IEEE TRANSACTIONS ON PLASMA SCIENCE (2002)

Article Physics, Fluids & Plasmas

One-dimensional model of the plasma flow in a Hall thruster

E Ahedo et al.

PHYSICS OF PLASMAS (2001)