skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Microwave processes in the SPD-ATON stationary plasma thruster

Abstract

Results of experimental studies of microwave processes accompanying plasma acceleration in the SPD-ATON stationary plasma thruster are presented. Specific features of the generation of microwave oscillations in both the acceleration channel and the plasma flow outgoing from the thruster are analyzed on the basis of local measurements of the spectra of the plasma wave fields. Mechanisms for generation of microwave oscillations are considered with allowance for the inhomogeneity of the electron density and magnetic field behind the edge of the acceleration channel. The effect of microwave oscillations on the electron transport and the formation of the discharge current in the acceleration channel is discussed.

Authors:
 [1]
  1. Russian Academy of Sciences, Kotelnikov Institute of Radio Engineering and Electronics (Fryazino Branch) (Russian Federation)
Publication Date:
OSTI Identifier:
22614087
Resource Type:
Journal Article
Resource Relation:
Journal Name: Plasma Physics Reports; Journal Volume: 42; Journal Issue: 9; Other Information: Copyright (c) 2016 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ELECTRIC DISCHARGES; ELECTRON DENSITY; ELECTRON TRANSFER; MAGNETIC FIELDS; MICROWAVE RADIATION; OSCILLATIONS; PLASMA ACCELERATION; PLASMA WAVES; SPECTRA; THRUSTERS

Citation Formats

Kirdyashev, K. P., E-mail: kpk@ms.ire.rssi.ru. Microwave processes in the SPD-ATON stationary plasma thruster. United States: N. p., 2016. Web. doi:10.1134/S1063780X16090051.
Kirdyashev, K. P., E-mail: kpk@ms.ire.rssi.ru. Microwave processes in the SPD-ATON stationary plasma thruster. United States. doi:10.1134/S1063780X16090051.
Kirdyashev, K. P., E-mail: kpk@ms.ire.rssi.ru. 2016. "Microwave processes in the SPD-ATON stationary plasma thruster". United States. doi:10.1134/S1063780X16090051.
@article{osti_22614087,
title = {Microwave processes in the SPD-ATON stationary plasma thruster},
author = {Kirdyashev, K. P., E-mail: kpk@ms.ire.rssi.ru},
abstractNote = {Results of experimental studies of microwave processes accompanying plasma acceleration in the SPD-ATON stationary plasma thruster are presented. Specific features of the generation of microwave oscillations in both the acceleration channel and the plasma flow outgoing from the thruster are analyzed on the basis of local measurements of the spectra of the plasma wave fields. Mechanisms for generation of microwave oscillations are considered with allowance for the inhomogeneity of the electron density and magnetic field behind the edge of the acceleration channel. The effect of microwave oscillations on the electron transport and the formation of the discharge current in the acceleration channel is discussed.},
doi = {10.1134/S1063780X16090051},
journal = {Plasma Physics Reports},
number = 9,
volume = 42,
place = {United States},
year = 2016,
month = 9
}
  • Results from experimental studies of integral characteristics of laboratory models of second-generation ATON stationary plasma thrusters are presented. Special attention is paid to high-voltage modes with a sufficiently high specific anode propulsive burn. Integral parameters of the thrusters were measured using a test bench with diffusion evacuation at the Moscow State Institute of Radioengineering, Electronics, and Automation and that with cryogenic evacuation at the Fakel Experimental and Design Bureau. The values of the thrust, specific propulsive burn, and efficiency measured in these test benches in the main operating mode coincide to within measurement errors. At a discharge power of 2more » kW and voltage of about 700 V, the specific anode propulsive burn and anode thrust efficiency reach 3000 s and 60%, respectively. The experimental data show that the efficiency of the ATON stationary plasma thruster operating in a high-voltage mode is higher than that of other similar thrusters.« less
  • It was found through the experiments made with an Aton-type Hall thruster that some of the propellant was ionized in the buffer chamber by 'quick electrons'. This ionization is called 'preionization' to discriminate it from the ionization in the discharge channel. The effect of preionization on low frequency oscillation was experimentally studied by changing the electric field intensity in the buffer chamber. The relationship between low frequency oscillation and preionization ratio was investigated through numerical simulation using a one-dimensional quasineutrality hydrodynamic model. The results obtained indicate that the amplitude of low frequency oscillation decreases as the preionization ratio increases. Itmore » was found through the analysis and numerical simulation of the physical process of low frequency oscillation that the positive feedback of electron density was the main cause of low frequency oscillation. The increase of preionization ratio decreases the amplitude of the feedback variation thereby reducing the amplitude of low frequency oscillation.« less
  • The origin of the oscillations in the range 1-100 kHz, which have been observed during the working of stationary plasma thruster (SPT) is not well understood until now. The purpose of this paper is first to clarify the nature of these oscillations and second to propose an explanation using the concept of current instabilities proposed by Buneman. To reach this objective, a spectral study of the linear instabilities has been performed with a stationary quasineutral hybrid model. These computations show unambiguously a relationship between the nonlinear oscillations that appear in the transient simulation and the growth rate of the linearmore » model. A simplified model is also derived, which highlights the role played by the coupling between the electric field and the ion current leading to Buneman's instabilities. This study suggests to reduce the amplitude of the oscillations controlling the growth rate of the linear mode by modifying the profile of the magnetic field inside the SPT channel. Numerical simulations illustrate the performances of the improvement.« less
  • A three-dimensional model of atom and ion dynamics in the accelerating channel of a stationary plasma thruster (SPT) is based on the model kinetic equations. Electron dynamics is described based on available experimental data. The expression for the electric field was obtained from the equation of electron impulse conservation law with the use of 'thermalized potential' assumption. The simulation was performed for a particular SPT with a thrust vector deviation. A quantitative agreement with the experimental results was obtained on thrust and thrust vector deviation angles for two different SPT operation modes. Calculated distributions of macroparameters demonstrate azimuthally asymmetrical ionizationmore » and acceleration processes in this particular SPT.« less
  • Results from experimental studies of the structure of high-frequency waves near the exit plane of a stationary plasma thruster are presented. The role played by such waves in the electron transport across the magnetic field is discussed on the basis of the obtained experimental data.