Characteristics of the Single-Gap Pseudospark Discharge Under Nanosecond Pulsed Voltages

Jia, Zhang; Liu, Xiaotao

doi:10.1007/s11090-017-9817-7

Cited by 3 publications

(1 citation statement)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[6] There are many experimental studies on PS-sourced plasma cathode electron gun (also called HC electron gun), and what are easily measured in experiment were only discharge voltage, discharge current and electron beam current. [13][14][15][16] Numerical simulation was also a feasible method with the help of particle in cell (PIC) and Monte Carlo collision (MCC) methods. [17][18][19][20][21][22] Some researchers studied the discharge mechanism by simulating the PS discharge, [17][18][19][20] and others investigated the influences of various operating conditions on the discharge current.…”

Section: Introductionmentioning

confidence: 99%

Plasma simulation to analyze velocity distribution characteristics of pseudospark-sourced electron beam*

Li¹,

Hu²,

Xu³

et al. 2020

Chinese Phys. B

View full text Add to dashboard Cite

Pseudospark-sourced electron beam is a promising candidate for driving vacuum electronic devices to generate millimeter wave and terahertz wave radiation as it has a very high combined beam current density. However, the inherent velocity spread of the beam, which is difficult to measure in experiment, has a great influence on the operating frequency and efficiency of the vacuum electronic device. In this paper, the velocity distribution characteristics of the electron beam produced by a single-gap hollow cathode electron gun are numerically studied and a three-dimensional kinetic plasma simulation model of a single-gap hollow cathode electron gun is built by using particle in cell and Monte Carlo collision methods in Vorpal. Based on the simulation model, the time-dependent evolution of the plasma formation inside the hollow cathode and electron beam generation process are observed. It is demonstrated that the pseudospark-sourced electron beam has a relatively large velocity spread. The time-dependent velocity distribution of the beam is analyzed, and the dependence of the beam velocity distribution under various operating conditions such as anode–cathode potential difference, gas pressure, and cathode aperture size are also studied.

show abstract

Section: Introductionmentioning

confidence: 99%

Plasma simulation to analyze velocity distribution characteristics of pseudospark-sourced electron beam*

Li¹,

Hu²,

Xu³

et al. 2020

Chinese Phys. B

View full text Add to dashboard Cite

show abstract

Influence of electrode gap on breakdown voltages of a multi-gap pseudospark discharge device under nanosecond pulses

Zhang

Liu

2018

Physics of Plasmas

View full text Add to dashboard Cite

Pseudospark-sourced electron beams of high energy can be produced in multi-gap pseudospark devices under high breakdown voltages. The breakdown voltages and the gap separation of the discharge device have been studied. Collisional ionization in the gaps has been semi-quantitatively analyzed. Based on the results, the influence of the electrode gap on the breakdown voltages has been verified. Collisional ionization during device discharge begins initially in the first gap near the cathode. The electrons produced in the first gap move towards the second gap and contribute to the collisional ionization in the second gap. The process proceeds to successive gaps with collisional ionization occurring in all gaps. For wider gap separations, the number of collisional ionizations in the gap is large, and hence, more electrons move through the intermediate electrodes into the posterior gaps. This creates a cascading of collisional ionizations, leading to a decrease in breakdown voltage. The influence of the coefficient of collisional ionization on the whole process in the posterior gaps may be slight under different gap separations, as electrons moving into the posterior gaps are plentiful. The breakdown voltage mainly depends on the first gap separation near the cathode.

show abstract

Breakdown Characteristics of Triggered Pseudospark Discharge-Based Multigap Plasma Cathode Electron Source

Varun

Dwivedi²,

Pal

2018

IEEE Trans. Electron Devices

View full text Add to dashboard Cite

Characteristics of the Single-Gap Pseudospark Discharge Under Nanosecond Pulsed Voltages

Cited by 3 publications

References 23 publications

Plasma simulation to analyze velocity distribution characteristics of pseudospark-sourced electron beam*

Plasma simulation to analyze velocity distribution characteristics of pseudospark-sourced electron beam*

Influence of electrode gap on breakdown voltages of a multi-gap pseudospark discharge device under nanosecond pulses

Breakdown Characteristics of Triggered Pseudospark Discharge-Based Multigap Plasma Cathode Electron Source

Contact Info

Product

Resources

About