Accession Number:

AD0733441

Title:

Electromagnetic and Finite Electron Beta Effects on the Modified Two Stream Instability,

Descriptive Note:

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s):

Report Date:

1971-10-01

Pagination or Media Count:

15.0

Abstract:

When there is relative motion between electrons and ions across a magnetic field in a plasma, it has been shown theoretically that a modified two stream instability may develop. This instability has a fluid-like character and can interact strongly with the ions. Also, it is insensitive to the electron-ion temperature ratio. Previous analyses have been restricted to the electrostatic limit. In the paper the authors consider electromagnetic and finite electron beta effects on this instability. These effects are found to stabilize the instability in certain regions of the parameter space characterizing the plasma. Marginal stability curves are presented. Perhaps the most important result is that for waves which are likely to produce large ion heating, instability occurs provided Uv sub A approximately equals or 1 beta sub e sup 12, where U is the relative drift speed and V sub A is the Alfven speed. The experimental significance of the results is discussed. Author

Subject Categories:

  • Plasma Physics and Magnetohydrodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE