Influence of pulse frequency on discharge characteristics of micro-cathode arc thruster

Ji, Tianyuan; Wei, Liqiu; Wang, Yanfei; Song, Yang; Cai, Haikuo; Li, Hong; Ding, Yongjie; Yu, Daren

doi:10.1016/j.vacuum.2021.110748

Cited by 11 publications

(2 citation statements)

References 16 publications

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“…The operating voltage of micro-cathode arc thruster is 400 V-800 V, the operating cycle frequency is 5 Hz-20 Hz, the discharge times are 10 4 times-10 5 times. The power handling unit used capacitors as energy storage elements and insulated gate bipolar transistors for energy feed-in control [15].…”

Section: Microcathode Arc Thrustermentioning

confidence: 99%

Analysis of ionization characteristics during single discharge of microcathode arc thruster

Wei²,

Wang³

et al. 2023

J. Phys. D: Appl. Phys.

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In this study, to examine the internal discharge process of microcathode arc thruster arc pits, electrical detection was combined with enhanced ICCD spectroscopic detection to diagnose the interpolar ionization characteristics of microcathode arc thrusters with 1-μs time resolution for examining the microsecond-level discharge process. After titanium ion spectroscopic model calculations were used to obtain the ion density distribution in the microcathode arc thruster arc maintenance process, it was found that the microcathode arc thruster cathode emitted plasma density in a single cycle over time, in a bimodal pattern. This phenomenon might be related to the microcathode arc thruster in a single discharge by the combined effect of arc heat transfer and ion current impact. The results showed that changes in the input energy of the power processing unit (PPU) can effectively affect the temporal relationship between electric arc ionization and impact ionization and further affect the ionization concentration of the microcathode arc-thruster cathode.

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Section: Microcathode Arc Thrustermentioning

confidence: 99%

Analysis of ionization characteristics during single discharge of microcathode arc thruster

Wei²,

Wang³

et al. 2023

J. Phys. D: Appl. Phys.

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“…During the interaction between the arc and cathode material, micro explosions on the surface of the cathode crater are inevitable, and the molten metal in the cathode crater is ejected from the crater to the external environment under the action of gas forces [1][2][3][4][5]. The generation of these metal droplets brings new challenges to the cathode working medium ionization process of the µCAT and the surface maintenance of various structural components [6][7][8]. To face this problem, various related institutions have conducted a lot of research.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the physical process inside the crater during the ablation of the cathode material of a micro-cathode arc thruster

Wei

Wang

et al. 2023

J. Phys. D: Appl. Phys.

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In this paper, the relationship between the morphology of the cathode crater and plasma ionization between thrusters is studied by adjusting the input energy of the micro-cathode arc thruster (μCAT). We monitor the morphology of the cathode crater of the μCAT using scanning electron microscopy and explore the relationship between the crater morphology and the internal energy loss of the cathode crater. This relationship, combined with the numerical simulation results, is used to monitor the ionization between the electrodes of the μCAT using an enhanced intensified charge coupled device (ICCD) spectrum detector. The effect of cathode crater morphology on the ionization of the propellant during the operation of the μCAT is determined. The results show that with a change in the input power processing unit (PPU) voltage, the external profile and depth-to-diameter ratio of the cathode crater change, resulting in a change in the internal energy loss of the thruster cathode crater and then affecting the ionization efficiency of the cathode working fluid in the μCAT. Under the condition of basically unchanged cathode feed energy flow density , reasonable adjustment of the depth-to-diameter ratio of the cathode crater can effectively improve the ionization efficiency of the cathode working fluid in the μCAT.

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Characterization method of conductive film state of micro-cathode arc thrusters

Zhang,

Yu,

Yan

et al. 2024

J Electr Propuls

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Influence of pulse frequency on discharge characteristics of micro-cathode arc thruster

Cited by 11 publications

References 16 publications

Analysis of ionization characteristics during single discharge of microcathode arc thruster

Analysis of ionization characteristics during single discharge of microcathode arc thruster

Investigation of the physical process inside the crater during the ablation of the cathode material of a micro-cathode arc thruster

Characterization method of conductive film state of micro-cathode arc thrusters

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