Observation of a high-energy tail in ion energy distribution in the cylindrical Hall thruster plasma

Lim, Yong‐Kon; Kim, Holak; Choe, Wonho; Lee, Seung Hun; Seon, Jongho; Lee, Hae June

doi:10.1063/1.4897178

Cited by 19 publications

(9 citation statements)

References 14 publications

(21 reference statements)

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“…[9,34,35] The work of Gas Discharge Physics Lab in Korea Advanced Institute of Science and Technology headed by Wonho Choe mainly focus on the cylindrical Hall thrusters and the plasma diagnostics. [36][37][38] Harbin Institute of Technology Plasma Propulsion Laboratory (HPPL) in China headed by Yu Daren is a new research group, which began to build their experiments facilities and study Hall thrusters in 2004. They have done some exploratory researches on lowfrequency oscillations, including the influencing factors, physical mechanism, and stabilizing.…”

Section: Research Groupmentioning

confidence: 99%

Low-frequency oscillations in Hall thrusters

Wei

Han

et al. 2015

Chinese Phys. B

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In this paper, we summarize the research development of low-frequency oscillations in the last few decades. The findings of physical mechanism, characteristics and stabilizing methods of low-frequency oscillations are discussed. It shows that it is unreasonable and incomplete to model an ionization region separately to analyze the physical mechanism of low-frequency oscillations. Electro-dynamics as well as the formation conditions of ionization distribution play an important role in characteristics and stabilizing of low-frequency oscillations. Understanding the physical mechanism and characteristics of low- frequency oscillations thoroughly and developing a feasible method stabilizing this instability are still important research subjects.

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Section: Research Groupmentioning

confidence: 99%

Low-frequency oscillations in Hall thrusters

Wei

Han

et al. 2015

Chinese Phys. B

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“…The works of the Komurasaki-Koizumi Laboratory at the University of Tokyo include developing model and improving the characteristics and suppressing low-frequency oscillations [7,29]. The works of the Gas Discharge Physics Lab in the Korea mainly focus on cylindrical type Hall thrusters and plasma diagnostics [30,31]. The Harbin Institute of Technology Plasma Propulsion Laboratory (HPPL) in China is a new research group, which began to study Hall thrusters in 2004.…”

Section: Research Groups For Plasma Instabilitymentioning

confidence: 99%

Application of an Electric Field to Low-Frequency Oscillation Control in Hall Thrusters

Wei¹,

Ding²,

Yu³

2018

Electric Field

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In order to satisfy the national demands for developing a long-life satellite platform, lunar exploration, and deep-space exploitation, Hall thrusters are now considered the preferred candidate for spacecraft propulsion. A Hall thruster is a type of electric propulsion with an annular structure, in which a propellant, usually xenon, is ionized and then accelerated by electrostatic force to create a propulsive thrust. Low-frequency discharge current oscillations, also called breathing mode oscillations in some references, are among the major research topics of Hall thrusters. Low-frequency oscillations in the range of 10-100 kHz might affect the reliability of power processing unit and reduce the efficiency and specific impulse of Hall thrusters. The control of low-frequency oscillations is an essential challenge in the space application of Hall thrusters. It is proved that the electric field is a highly important influence factor for low-frequency oscillations; therefore, application of a dynamic electric field is a practical way to control low-frequency oscillation.

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“…However, the presence of multiply charged ions is strongly related to thruster performance, [9][10][11][12] power dissipation, wall erosion, 13 etc., because of the high momentum and charge state of these particles. On the other hand, a large multiply charged Xe ion fraction 9,14 has been clearly confirmed in cylindrical-type Hall thrusters (CHTs) for low-power applications. [15][16][17][18][19] As will be discussed below, we report on the significant influence of the different magnetic field geometries, which are obtained through a simple modification of the coil polarity, on the thruster performance and beam characteristics.…”

Section: Effect Of Magnetic Field Configuration On the Multiply Chargmentioning

confidence: 99%

Effect of magnetic field configuration on the multiply charged ion and plume characteristics in Hall thruster plasmas

Kim

Lim

Choe

et al. 2015

Applied Physics Letters

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Multiply charged ions and plume characteristics in Hall thruster plasmas are investigated with regard to magnetic field configuration. Differences in the plume shape and the fraction of ions with different charge states are demonstrated by the counter-current and co-current magnetic field configurations, respectively. The significantly larger number of multiply charged and higher charge state ions including Xe 4þ are observed in the co-current configuration than in the counter-current configuration. The large fraction of multiply charged ions and high ion currents in this experiment may be related to the strong electron confinement, which is due to the strong magnetic mirror effect in the co-current magnetic field configuration. V

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Observation of a high-energy tail in ion energy distribution in the cylindrical Hall thruster plasma

Cited by 19 publications

References 14 publications

Low-frequency oscillations in Hall thrusters

Low-frequency oscillations in Hall thrusters

Application of an Electric Field to Low-Frequency Oscillation Control in Hall Thrusters

Effect of magnetic field configuration on the multiply charged ion and plume characteristics in Hall thruster plasmas

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