Accession Number : AD0636182

Title :   CHEMICAL RELEASE STUDIES V: RECOMBINATION DURING RADIAL FREE EXPANSION OF A PLASMA SPHERE.

Descriptive Note : Technical rept.

Corporate Author : GEOPHYSICS CORP OF AMERICA BEDFORD MASS

Personal Author(s) : Berger, A. W. ; Golomb,D.

Report Date : JAN 1961

Pagination or Media Count : 26

Abstract : Smith's analysis of ion-electron recombination in nozzle flow is adapted to radial free expansion of a plasma sphere. A 'peeling onion' model is developed; the plasma ball sheds outer layers from an undisturbed core until the center is reached. Each layer in turn serves as a steady state source for the expanding gas. A family of curves of the degree of ionization vs. reduced time for the retreating layers is obtained. The degree of ionization asymptotically approaches a quenched value, beta infinity (r). Evaluation of beta infinity (r) vs. the radii of the source layers indicates that the degree of ionization increases from the edges of the expanding plasma toward the center. The fraction of ions quenched is determined by integration over the volume elements. The recombination of iodine (in argon carrier) released by shattering glass spheres is suggested as an experimental test of the expansion model. (Author)

Descriptors :   (*KINETIC THEORY, PLASMAS(PHYSICS)), (*RECOMBINATION REACTIONS, *PLASMAS(PHYSICS)), GAS IONIZATION, IONS, ELECTRONS, NOZZLE GAS FLOW, ATMOSPHERIC SOUNDING, CHEMICAL REACTIONS, IODINE

Subject Categories : Atmospheric Physics
      Physical Chemistry
      Fluid Mechanics
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE