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Title: Fluid and hybrid simulations of the ionization instabilities in Hall thruster

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/5.0094269· OSTI ID:1889250

Low-frequency axial oscillations in the range of 5–50 kHz stand out as a pervasive feature observed in many types of Hall thrusters. While it is widely recognized that the ionization effects play the central role in this mode, as manifested via the large-scale oscillations of neutral and plasma density, the exact mechanism(s) of the instabilities remain unclear. To gain further insight into the physics of the breathing mode and evaluate the role of kinetic effects, a one-dimensional time-dependent full nonlinear low-frequency model describing neutral atoms, ions, and electrons is developed in full fluid formulation and compared to the hybrid model in which the ions and neutrals are kinetic. Both models are quasi-neutral and share the same electron fluid equations that include the electron diffusion, mobility across the magnetic field, and the electron energy evolution. The ionization models are also similar in both approaches. Further, the predictions of fluid and hybrid simulations are compared for different test cases. Two main regimes are identified in both models: one with pure low-frequency behavior and the other one, where the low-frequency oscillations coexist with high-frequency oscillations in the range of 100–200 kHz, with the characteristic time scale of the ion channel fly-by time, 100–200 kHz. The other test case demonstrates the effect of a finite temperature of injected neutral atoms, which has a substantial suppression effect on the oscillation amplitude.

Research Organization:
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
Sponsoring Organization:
USDOE; US Air Force Office of Scientific Research (AFOSR)
Grant/Contract Number:
AC02-09CH11466; FA9550-15-1-0226
OSTI ID:
1889250
Journal Information:
Journal of Applied Physics, Vol. 132, Issue 5; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (45)

Resistive instabilities in Hall current plasma discharge journal February 2001
Experimental studies of anode sheath phenomena in a Hall thruster discharge journal May 2005
Physics of E  ×  B discharges relevant to plasma propulsion and similar technologies journal December 2020
Perturbation analysis of ionization oscillations in Hall effect thrusters journal December 2014
Theory for the anomalous electron transport in Hall effect thrusters. I. Insights from particle-in-cell simulations journal May 2016
BOUT++: A framework for parallel plasma fluid simulations journal September 2009
One-dimensional hybrid-direct kinetic simulation of the discharge plasma in a Hall thruster journal November 2012
Numerical and Experimental Investigation of Longitudinal Oscillations in Hall Thrusters journal May 2021
Study on breathing mode oscillation suppression of self-excited Hall thrusters journal November 2012
Anomalous electron mobility in a coaxial Hall discharge plasma journal January 2001
Loading and Injection of Maxwellian Distributions in Particle Simulations journal August 2000
Solving the Boltzmann equation to obtain electron transport coefficients and rate coefficients for fluid models journal October 2005
Particle-in-cell charged-particle simulations, plus Monte Carlo collisions with neutral atoms, PIC-MCC journal April 1991
Low-frequency oscillations in Hall thrusters journal April 2015
Low-frequency model of breathing oscillations in Hall discharges journal April 2009
Stabilizing of low frequency oscillation in Hall thrusters journal November 2008
Nonlinear structures and anomalous transport in partially magnetized E×B plasmas journal January 2018
Numerical investigation and modeling of stationary plasma thruster low frequency oscillations journal March 2005
Anode sheath in Hall thrusters journal September 2003
Some mathematical questions of plasma ionization journal January 2021
Numerical investigation of closed-loop control for Hall accelerators journal January 2011
Growth of resistive instabilities in E×B plasma discharge simulations journal January 2008
One-dimensional hydrodynamic model of the atom and ion dynamics in a stationary plasma thruster journal March 2000
Vanishing of the negative anode sheath in a Hall thruster journal August 2005
The origin of the breathing mode in Hall thrusters and its stabilization journal August 2021
2D radial-azimuthal particle-in-cell benchmark for E × B discharges journal July 2021
Modelling of Stationary Plasma Thrusters journal September 2004
Predictive, data-driven model for the anomalous electron collision frequency in a Hall effect thruster journal October 2018
Interior and Exterior Laser-Induced Fluorescence and Plasma Measurements within a Hall Thruster journal January 2002
Evolution of the electron cyclotron drift instability in two-dimensions journal August 2018
Review of the Plasma Fluid Models in Stationary Plasma Thrusters journal January 2001
On the Origin of Low Frequency Oscillations in Hall Thrusters
  • Barral, S.; Ahedo, E.; Hartfuss, Hans-Jürgen
  • PLASMA 2007: International Conference on Research and Applications of Plasmas; 4th German-Polish Conference on Plasma Diagnostics for Fusion and Applications; 6th French-Polish Seminar on Thermal Plasma in Space and Laboratory, AIP Conference Proceedings https://doi.org/10.1063/1.2909170
conference January 2008
Low frequency oscillations in a stationary plasma thruster journal October 1998
Fluid Model of hall Thruster - Comparison with Hybrid Model journal January 2001
Hybrid Model of a Stationary Plasma Thruster journal October 2021
A one-dimensional with three-dimensional velocity space hybrid-PIC model of the discharge plasma in a Hall thruster journal March 2017
On the mechanism of ionization oscillations in Hall thrusters journal June 2021
One-Dimensional hybrid model of a stationary plasma thruster journal October 2000
Current flow instability and nonlinear structures in dissipative two-fluid plasmas journal January 2018
Two-dimensional model of a stationary plasma thruster journal May 2002
Analysis of the steady-state axial flow in the Hall thruster journal October 2002
Theory and Modelling of Axial Mode Oscillations in Hall Thruster conference August 2019
Fluid theory and simulations of instabilities, turbulent transport and coherent structures in partially-magnetized plasmas of $\mathbf{E}\times \mathbf{B}$ discharges journal November 2016
Role of anomalous electron transport in a stationary plasma thruster simulation journal January 2003
SUNDIALS: Suite of nonlinear and differential/algebraic equation solvers journal September 2005