Accession Number:

AD0736776

Title:

Polarization, Steepening and Striation in Barium Clouds

Descriptive Note:

Semi-annual technical rept. 15 Mar-14 Sep 1971

Corporate Author:

ROCHESTER UNIV NY

Personal Author(s):

Report Date:

1971-09-01

Pagination or Media Count:

44.0

Abstract:

Numerical results are presented for the diffusive growth in time of a barium cloud in a highly but not infinitely conducting ionosphere. Polarization effects produce steepening of the backside and a thinning and indentation on the front side. A crude estimate of the time required for appreciable distortion is given. Numerical results are also given for the linearized equations of motion about an ellipsoidal gaussian equilibrium distribution. A new numerical method yields the fastest growing eigenvalue and eigenfunction and has been pushed to 49 x 49 size grids covering the cloud. The resultant eigenfunctions in the plane perpendicular to the B field are concentrated in the rear of the cloud and are elongated parallel to the cloud drift velocity. Finally, it is shown that results already available in the original E x B instability paper can be used to obtain an estimate of the striation scale size and onset time.

Subject Categories:

  • Atmospheric Physics
  • Plasma Physics and Magnetohydrodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE