Modulating action of low frequency oscillations on high frequency instabilities in Hall thrusters

Wei, Liqiu; Han, Lina; Yang, Ziyi; Li, Jing; Cao, Yong; Yu, Daren; Du, Jia

doi:10.1063/1.4906975

Cited by 4 publications

(1 citation statement)

References 25 publications

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“…Application of the photographic method. The distribution characteristics of the plasma parameters of the thruster plume are closely related to the ionization and acceleration characteristics of the neutral atoms in the discharge channel, and the ionization and acceleration processes of the neutral gas in the channel are related to many external phenomena in the discharge process of the thruster, such as low-frequency oscillation [40][41][42]. Therefore, this method can obtain the variations in the plasma parameters in the plume area, and thus any change in the operating status of the in-orbit thruster can be monitored.…”

Section: Electron Temperature Distribution Of the Tal Plumementioning

confidence: 99%

A photographic method for in-orbit measurement of electron temperature distribution in the plume of Hall thrusters

Wei

Ding

et al. 2018

Plasma Sources Sci. Technol.

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This paper presents a method for measuring the plasma parameters of a Hall thruster plume based on image diagnostics. A digital camera obtains the plume image, and the RGB (red, green, blue) data extracted from the plume image are related to the light intensity information of different spectral lines. A photographic method for obtaining the electron temperature distribution in the Hall thruster plume is established by using RGB data based on the collisionalradiative (CR) model. The results from this photographic method were compared with published results from measurements made with a Langmuir probe and simulated results. The trends of the electron temperature distribution were similar to those results. The limitations and application of the photographic method, which could ensure that it is suitable for diagnosing the plasma parameters of the in-orbit Hall thruster plume, are also discussed.

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Section: Electron Temperature Distribution Of the Tal Plumementioning

confidence: 99%

A photographic method for in-orbit measurement of electron temperature distribution in the plume of Hall thrusters

Wei

Ding

et al. 2018

Plasma Sources Sci. Technol.

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Time resolved and time integrated analysis of the AXUV photodiode diagnostics for EUV and soft X-ray emission of nanosecond-laser-produced plasma

Farahbod

Morshedian

Aram

2020

Fusion Engineering and Design

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Broadband (kHz–GHz) characterization of instabilities in Hall thruster inside a metallic vacuum chamber

Mazières

Guglielmi²,

Laquerbe

et al. 2022

Physics of Plasmas

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Hall thrusters are known to exhibit a large variety of instabilities. Their physical mechanisms have been identified at low (kHz) and intermediate (MHz) frequencies, even though they are still not fully understood. Furthermore, electromagnetic radiations generated by Hall thrusters, named “self-emission” of the thruster, have been measured from kHz to MHz as expected from the identified instabilities, but also at higher frequencies. The origin of the high frequency (GHz) self-emission remains for now unknown. Assessing this self-emission, that is important for understanding the physics of Hall thrusters as well as for electromagnetic compatibility issues with the spacecraft, is challenging. Another aspect that makes the understanding of the physics of Hall thrusters complex comes from the eventual coupling between instabilities, which has been recently suggested and observed. The aim of this paper is to explore the possibility of characterizing simultaneously instabilities in Hall thrusters on a broadband frequency range (from kHz to GHz) in situ, meaning in a conventionally used vacuum chamber where Hall thrusters are usually operated. We show in this paper that, despite the reverberant nature of the vacuum metallic chamber, useful information is extracted at low and intermediate frequencies and even at high frequency from the measurements done with an antenna in this environment.

show abstract

Modulating action of low frequency oscillations on high frequency instabilities in Hall thrusters

Cited by 4 publications

References 25 publications

A photographic method for in-orbit measurement of electron temperature distribution in the plume of Hall thrusters

A photographic method for in-orbit measurement of electron temperature distribution in the plume of Hall thrusters

Time resolved and time integrated analysis of the AXUV photodiode diagnostics for EUV and soft X-ray emission of nanosecond-laser-produced plasma

Broadband (kHz–GHz) characterization of instabilities in Hall thruster inside a metallic vacuum chamber

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