Accession Number : ADA257765


Title :   Force-Free Time-Harmonic Plasmoids


Descriptive Note : Interim rept. Nov 1991-Jul 1992


Corporate Author : DAYTON UNIV OH RESEARCH INST


Personal Author(s) : Nachamkin, Jack


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a257765.pdf


Report Date : Oct 1992


Pagination or Media Count : 102


Abstract : A heretofore unexplored solution of Maxwell's equations is investigated for time-harmonic waves in a partially ionized gas. The analysis is focused on the spherically symmetric cases that behave like electromagnetic energy trapped in the form of a plasmoid . It will be shown that a critical frequency exists, below which the current cannot be carried by electrons and the plasmoid remains stable. Resonant sizes will be shown to exist such that plasmoids will not exchange energy with their external surroundings, and their boundary conditions can be met by vacuum solutions to Maxwell's equations. Virial analysis calculates free-change density and critical frequency to be consistent with Newtonian mechanics and classical electromagnetics. A stable vortical motion of the plasma will be shown to exactly cancel the dominant component of the electromechanical stresses, with the residual stresses being a strongly decreasing function of frequency.


Descriptors :   *PLASMAS(PHYSICS) , *ELECTROMAGNETISM , STRESSES , VELOCITY , FREQUENCY , ENERGY , ELECTRIC FIELDS , DRIFT , IONIZED GASES , MAXWELLS EQUATIONS , ELECTRONS , HARMONICS , RADIATION , MAGNETIC FIELDS , STABILITY


Subject Categories : Electricity and Magnetism
      Plasma Physics and Magnetohydrodynamics


Distribution Statement : APPROVED FOR PUBLIC RELEASE