Space Charge Effects in Field Emission: One Dimensional Theory

Abstract

The current associated with field emission is greatly dependent on the electric field at the emitting electrode. This field is a combination of the electric field in vacuum and the space charge created by the current. The latter becomes more important as the current density increases. Here, a study is performed using a modified classical one dimensional 1D Child-Langmuir description that allows for exact solutions in order to characterize the contributions due to space charge. Methods to connect the 1D approach to an array of periodic three dimensional structures are considered.

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Document Details

Document Type
Technical Report
Publication Date
Jan 05, 2010
Accession Number
ADA514451

Entities

People

  • A. Rokhlenko
  • J. L. Lebowitz
  • K. L. Jensen

Organizations

  • Rutgers University–New Brunswick

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Charged Particles
  • Current Density
  • Electric Fields
  • Electrons
  • Emission
  • Emitters
  • Equations
  • Fermi Levels
  • Field Emission
  • Free Electron Lasers
  • Free Electrons
  • Geometry
  • New York
  • Particle Accelerators
  • Space Charge
  • Three Dimensional
  • Work Functions

Fields of Study

  • Physics

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Pulsed Power and Plasma Physics.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster