Prebreakdown Processes in a Metal Surface Microprotrusion Exposed to an RF Electromagnetic Field

A 2-D two-temperature model has been developed to simulate the heating of a microprotrusion on a metal surface exposed to a radio frequency (~10 GHz) electromagnetic field. The numerical simulation using this model includes a self-consistent calculation of the electric field at the microprotrusion s...

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Bibliographic Details
Published in:IEEE transactions on plasma science 2019-08, Vol.47 (8), p.3400-3405
Main Authors: Barengolts, Sergey A., Uimanov, Igor V., Shmelev, Dmitry L.
Format: Article
Language:English
Subjects:
Acceleration
Arc discharges
Computer simulation
Current distribution
Density distribution
Electric breakdown
Electric fields
electrical breakdown
Electromagnetic fields
Electromagnetic heating
Electromagnetism
electron emission
Field emission
Heat exchange
Heat transfer
Heating
Interaction parameters
Iron
Mathematical model
Mathematical models
Metal surfaces
Metals
Particle in cell technique
Plasma
Prebreakdown
Radio frequency
Resistance heating
Thermodynamics
Two dimensional models
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Summary:A 2-D two-temperature model has been developed to simulate the heating of a microprotrusion on a metal surface exposed to a radio frequency (~10 GHz) electromagnetic field. The numerical simulation using this model includes a self-consistent calculation of the electric field at the microprotrusion surface and the field emission characteristics of the microprotrusion using the particle-in-cell method, a calculation of the current density distribution in the microprotrusion, and a calculation of the lattice and electron temperatures with the use of the heat equation taking into account the Joule and Nottingham effects, and also the finite rate of the heat exchange between the electrons and the lattice. The microprotrusion heating time has been calculated in relation to the electric field enhancement factor and to the electron-phonon interaction parameters.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2019.2914562