Scale Sizes and Lifetimes of F Region Plasma Cloud Striations as Determined by the Condition of Marginal Stability.

Abstract

The two dimensional integrated Pedersen conductivity model for F region plasma cloud striation development may be cast in dimensionless form. The result implies that a structure's stability against bifurcation depends upon whether a diffusion parameter R exceeds a critical value. The critical R for striations is determined by high resolution computer simulation for conductivity ratios M from 2 to 30. Our results combined with electron diffusivity of order 1 square meter/sec agree with observed minimum scale sizes of 15 meters. For turbulent diffusivity of order 100 square meter/sec, our results agree with frequent observations of kilometer-scale structures which 'freeze up' and last for times of order 10000 seconds. This lifetime is also predicted by our results. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Nov 17, 1980
Accession Number
ADA092568

Entities

People

  • B. E. Mcdonald
  • N. J. Zabusky
  • Sidney L. Ossakow
  • Steven T.P. Zalesak

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Computer Simulations
  • Computers
  • Conductivity
  • Diffusion
  • Diffusivity
  • Electrons
  • Engineering
  • Equations
  • Equations Of Motion
  • Geometry
  • High Resolution
  • Observation
  • Physics Laboratories
  • Security
  • Simulations
  • Two Dimensional

Readers

  • Calculus or Mathematical Analysis
  • Plasma Physics / Magnetohydrodynamics
  • Thermal Physics or Thermal Science.

Technology Areas

  • Microelectronics