Magnetic Field Generation in Shock Waves

Abstract

Laser produced plasma jets interacting with a background plasma have been used to study magnetic field generation in shock waves. Shock heating produces axial electron temperature and density gradients which are perpendicular to the radial temperature and density gradients. Electron heat transport and ion diffusion, in the radial direction, occur at different rates. This combination of nonparallel temperature and density gradients generate a magnetic field in the azimuthal direction. Simulations corroborate the experimental observation that magnetic fields are generated when a supersonic plasma jet interacts with a background plasma. Magnetic flux generated by this mechanism requires no initial field, which is in contrast to the dynamo mechanism which does require an initial seed field. Specific applications analyzed in this thesis include interplanetary shocks and nuclear EMP effects in the MHD domain. It may be assumed that shock generated magnetic fields are also of importance under astrophysical conditions. Magnetic field generation, Shocks, Plasma jets, Interplanetary shocks, Non-parallel temperature and density gradients, Simulations, Nuclear electromagnetic pulse.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1994
Accession Number
ADA282234

Entities

People

  • John P. Carter

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • C Programming Language
  • Computer Programming
  • Convection
  • Difference Equations
  • Diffusion
  • Electron Density
  • Electrons
  • Fluids
  • Geometry
  • Ionization
  • Mach Number
  • Magnetic Fields
  • Magnetic Flux
  • Plasma Jets
  • Shock Waves
  • Simulations
  • Temperature Gradients

Fields of Study

  • Physics

Readers

  • Combustion Dynamics and Shock Wave Physics.
  • Plasma Physics / Magnetohydrodynamics

Technology Areas

  • Directed Energy
  • Hypersonics
  • Microelectronics
  • Space
  • Space - Hall-Effect Thruster