Finite Larmor Radius and Collisional Effects on the Electron-Ion Hybrid Instability
Abstract
The Electron-Ion Hybrid instability, a transverse velocity shear-driven instability with frequency near the lower hybrid frequency, has been observed theoretically and experimentally. It was shown previously that the scale length of the gradient in the velocity must be much smaller than the ion gyroradius and larger than the electron gyroradius in order to generate the short wavelength electron-ion hybrid mode. In this paper, the original theory for the electron-ion hybrid instability has been extended to include finite gyroradius radius effects and electron-neutral collisions with the intention of applying this theory to the plasma region surrounding hypersonic vehicles. In this plasma layer, these sorts of transverse sheared flows can exist in a collisional plasma. While this dense layer of plasma can itself impede communications, the density structures created by the lower hybrid turbulence can also be a source of scattering for these electromagnetic signals.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 18, 2013
- Accession Number
- ADA589265
Entities
People
- C L Enloe
- C. Crabtree
- E. M. Tejero
- G. Ganguli
- V. I. Sotnikov
- W. E. Amatucci
Organizations
- United States Naval Research Laboratory