A “self-triggered” arc initiation applied in vacuum arc thrusters

Cui, Weisheng; Liu, Wenzheng; Gao, Yongjie

doi:10.1209/0295-5075/125/15001

Cited by 4 publications

(4 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Probe current variation with the bias voltage could be detected normally in the negative discharge plasma. A comparison with the Langmuir probe signals from vacuum plasma, gas-phase plasma, and space physical plasma showed that the probe signals of the SPP had a consistent instantaneous variation characteristic [48,54,57]. This demonstrated that the proposed Langmuir probe approach in this research could effectively absorb electron and ion currents.…”

Section: Resultsmentioning

confidence: 66%

“…Therefore, we calculated the Debye length of the SPP based on bubble theory according to λ DSP = ε 0 k B T e e 2 N e , where ε 0 , k B , N e , and T e are the vacuum dielectric constant, Boltzmann constant, plasma electron density, and plasma electron temperature, respectively [54,55]. By employing the parameter ranges from previous studies [25,26,[56][57][58][59], the result showed that 69 ≤ λ DSP ≤ 154 µm. It could be seen that the probe with r p = 50 µm used in this work satisfied the theoretical requirement of detection accuracy.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Plasma–Solution Junction for the Formation of Carbon Material

et al. 2022

View full text Add to dashboard Cite

The solution plasma process (SPP) can provide a low-temperature reaction field, leading to an effective synthesis of N-doped graphene with a high N content and well-structured planar structure. However, the interactions at the plasma–solution interface have not been well understood; therefore, it needs to be urgently explored to achieve the modulation of the SPP. Here, to address the knowledge gap, we experimentally determined the physical parameters of the spital distribution in the plasma phase, plasma–gas phase, and gas–liquid phase of the SPP by the Langmuir probe system with modification. Based on the assumption that plasma can act similarly to semiconductors with the Fermi level above the vacuum level, an energy band diagram of the plasma–solution junction could be proposed for the first time. It was observed that the Fermi level of the organic molecule could determine the magnitude of electron temperature in plasma, i.e., benzene produced the highest electron temperature, followed by phenol, toluene, and aniline. Finally, we found that the electron temperature at the interface could induce quenching, leading to the formation of multilayer large-size-domain carbon products. It provided significant evidence for achieving nonequilibrium plasma modulation of carbon nanomaterial synthesis.

show abstract

Section: Resultsmentioning

confidence: 66%

Section: Resultsmentioning

confidence: 99%

Plasma–Solution Junction for the Formation of Carbon Material

et al. 2022

View full text Add to dashboard Cite

show abstract

“…When applying design solutions, both the shape and the arrangement of elements of vacuum arc ignition systems are typically modified and additional components are introduced [7][8][9]. The use of new materials in starting discharge gaps reduces the surface breakdown voltage and enhances the reliability of ignition systems utilizing such materials [10,11]. Novel circuit solutions for the power supply sources of starting devices allow for further improvement in their reliability [12][13][14].…”

Section: Current State Of the Issuementioning

confidence: 99%

Long-Life Pulsed Vacuum-Arc Plasma Source

Sysoiev,

Shyrokyi,

Fesenko

2023

Problems of Atomic Science and Technology

View full text Add to dashboard Cite

The design of a pulsed vacuum-arc plasma source with an ignition system based on dielectric surface breakdown is presented and the principle of its operation is described. In the engineered plasma source, a four-section anode is used along with an equal number of arc ignition sections. Additionally, separate power supply circuits are employed for both the main pulsed arc discharge and the arc ignition circuit. Independent operation of each section of this device is carried out, essentially constituting a combination of four pulsed plasma sources in one, the coordinated functioning of which is ensured by the control system. Practical tests of the pulsed plasma source have revealed its advantages as followed: a fourfold increase in the ignition system life-time; achieving uniform depletion of the cathode working surface; and, under specific conditions, enhancing the productivity of the plasma source.

show abstract

“…The schematic of measurement system is shown in figure 4. This method has been previously used to diagnose the plasma parameters in a pulse vacuum discharge [31][32][33][34]. In this paper, because of the wide distribution range of plasma of the multielectrode, a novel '+' type probe composed of two copper wires crossed arrangement with a diameter of 0.1 mm and a length of 55 mm was designed.…”

Section: Measurement Systemmentioning

confidence: 99%

Study on generation characteristics of plasma jets of multi-electrode in a pulse vacuum discharge

Liu

Zhang

Tian

et al. 2020

Plasma Sources Sci. Technol.

Self Cite

View full text Add to dashboard Cite

In order to increase the production of plasma jets in a pulse vacuum discharge, based on the insulated anode electrode structure (IAES), discharge experiments by using multiple electrodes under one power supply are performed in this paper. During experiments, discharge currents flowing through multiple cathode sides (cathode currents) were measured by identical Rogowski coils at the same time. The plasma density and propagation velocity of plasma jets were measured by the self-designed ‘+’ type probes. Firstly, the differences in discharge characteristics and generation characteristics of plasma jets between the single-electrode and the double-electrode discharge were compared and analyzed. Secondly, the effects that the electrode spacing (D) and the capacitor capacity had on the discharge characteristics and generation characteristics of plasma jets of the multi-electrode were analyzed. Results show that because the discharge voltage of the IAES is dropped to the arc voltage after a long duration, the simultaneous discharge of multiple electrodes in a single pulse can be realized. Compared with the single-electrode discharge, using multiple electrodes to discharge simultaneously in a single pulse can decrease the initial discharge voltage, increase the peak of cathode current and increase the amount of plasma production. In addition, there is interaction between plasma jets of the multi-electrode, and the spatial electric field generated by the first ejected plasma jet will hinder the generation of plasma jets of subsequent electrodes. Only by keeping a certain electrode spacing (D) between the electrodes, can multiple electrodes be all discharged and plasma jets of the same length be produced. Increasing capacitor capacity can increase the plasma density, propagation velocity, length of plasma jets of the multi-electrode, and realize the simultaneous discharge of more electrodes in a single pulse.

show abstract

A “self-triggered” arc initiation applied in vacuum arc thrusters

Cited by 4 publications

References 27 publications

Plasma–Solution Junction for the Formation of Carbon Material

Plasma–Solution Junction for the Formation of Carbon Material

Long-Life Pulsed Vacuum-Arc Plasma Source

Study on generation characteristics of plasma jets of multi-electrode in a pulse vacuum discharge

Contact Info

Product

Resources

About