Simulation of Space-Charge-Limited Current for Hot Electrons With Initial Velocity in a Vacuum Diode

In this article, a sheet model is utilized to model and simulate hot electron transport properties in vacuum gap. Based on this model, emitted electrons with constant initial velocities and Maxwell-Boltzmann distribution are considered. Numerical analyses of the potential, electric field, current de...

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Bibliographic Details
Published inIEEE transactions on electron devices Vol. 68; no. 7; pp. 3604 - 3610
Main Authors Huang, Jin Bo, Yao, Ruo He, Zhao, Pan, Zhu, Ying Bin
Format Journal Article
LanguageEnglish
Published New York IEEE 01.07.2021
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Analytical models
Anodes
Boltzmann distribution
Cathodes
Charge simulation
Current density
Electric fields
Electric potential
Electron sheet model
Electron transport
Hot electrons
Maxwell–Boltzmann distribution
Model accuracy
Numerical models
Sheet modelling
Space charge
space charge limited
Transport properties
vacuum diode
Velocity distribution
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Summary:In this article, a sheet model is utilized to model and simulate hot electron transport properties in vacuum gap. Based on this model, emitted electrons with constant initial velocities and Maxwell-Boltzmann distribution are considered. Numerical analyses of the potential, electric field, current density, velocity, and phase-space distribution are also performed. The accuracy of this model is verified by comparing with analytical results. Furthermore, we studied the velocity distribution of the emitted electrons at any position in the interelectrode gap and observed a significant change in the distribution.
ISSN:0018-9383
1557-9646
DOI:10.1109/TED.2021.3085164