Thermo Field Emission in High Current Arc Discharge

Abstract

The effect of ion electrical current on the electron thermo field emission from metal surface of cathode in high current arc has been investigated. An electron emission process are considered as follow. One electron emitted due to field of ions in cathode layer is captured by ion to form an exited neutral atom which is then ionized by the electrical field. It is shown that in high current arc random fluctuation of electrical field induced by ions contributes significantly to this kind of emission. The electron emission coefficient is calculated for a variety of arc parameters and surface conditions. The mechanism of electron emission in arc discharge are discussed.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jul 20, 2003
Accession Number
ADP014970

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Coefficients
  • Current Density
  • Electric Arcs
  • Electric Fields
  • Electrical Engineering
  • Electron Emission
  • Electrons
  • Emission
  • Field Emission
  • Glow Discharges
  • Ionization
  • Ionized Gases
  • Photoexcitation
  • Probability
  • Probability Distributions
  • Surface Properties
  • Surface Temperature

Fields of Study

  • Physics

Readers

  • Internal Combustion Engine (ICE) Technology.
  • Plasma Physics / Magnetohydrodynamics
  • Surface Engineering/Surface Coating Technology.

Technology Areas

  • Microelectronics