Analysis of the Dissipation Mechanism within an Instationary Cathode Spot of Metal Vapor Arcs.

Abstract

This paper deals with the dissipation mechanism of microspots on low pressure arc cathodes. Based on a new MPD stability theory and on an experimentally found empirical relation between spot current and crater radius on pure copper and molybdenum cathodes, the time behavior of pressure and temperature within the spot and the appertaining voltage drop have been calculated. Emphasis has been placed on finding an analytical solution for the time dependent heat flux into the hemispherical crater surface as a function of the expansion of the spot.

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Document Details

Document Type
Technical Report
Publication Date
Aug 17, 1984
Accession Number
ADA149258

Entities

People

  • H. L. Kurtz
  • H. O. Schrade
  • M. Auweter-kurtz
  • M. Kirschner

Organizations

  • University of Stuttgart

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Charged Particles
  • Current Density
  • Electrons
  • Emission
  • Energy
  • Equations
  • Heat Energy
  • Heat Flux
  • Heat Transfer
  • Heat Transmission
  • Materials
  • Melting
  • Phase Transformations
  • Radiation
  • Surface Chemistry
  • Thermal Conductivity
  • Vapor Pressure

Fields of Study

  • Physics

Readers

  • Plasma Physics.