Accession Number : AD0436197


Title :   DIFFUSION OF PLASMAS ACROSS A MAGNETIC FIELD.


Descriptive Note : Final r pt. 1 Mar 63-28 Feb 64,


Corporate Author : MIAMI UNIV CORAL GABLES FLA


Personal Author(s) : Robertson,Harry S


Report Date : 28 Feb 1964


Pagination or Media Count : 36


Abstract : Experimental: Experimental investigation of transport processes in cesium arc plasmas shows classical ambipolar diffusion across low magnetic fields, convective transport associated with the helical instability at intermediate fields, and a return, apparently to diffusive transport and relatively good confinement at magnetic fields ten to twenty times the critical field for the onset of the instability. Improved confinement is also achieved by using a hysteresis in the parameter space of the plasma operation, a procedure which may have wide applicability. Theoretical: The methods of Brownian motion are used to describe the diffusion of electrons and ions in a plasma across a magnetic field in the presence of an anisotropic dynamical friction. The bivariate distribution function of a plasma in a magnetic field and the partial differential equation which it satisfies are found and the distribution function is used to calculate the diffusion coefficients. (Author)


Descriptors :   *PLASMAS(PHYSICS) , *MAGNETIC FIELDS , DIFFUSION , CESIUM , CONVECTION , STABILITY , CONFINEMENT(NUCLEAR REACTORS) , HYSTERESIS , ELECTRONS , IONS , ANISOTROPY , DYNAMICS , FUNCTIONS(MATHEMATICS)


Distribution Statement : APPROVED FOR PUBLIC RELEASE