Collisionless Dynamics of the Magnetosphere
Abstract
The research was motivated to understand the generation and transport of energetic particles found in laboratory, astrophysical and space plasmas. In particular, we studied the collisionless acceleration and transport of electrons driven by solar variability and the nonlinear dynamics of strong interchange instabilities. We created an "artificial radiation belt" in the laboratory, allowing the creation and study of intense interchange instabilities. Our investigations combined laboratory experimentation, computer simulation, and plasma theory. Recent measurements confirmed our self-consistent model for the nonlinear evolution of the interchange instability of hot plasma confined by dipolar magnetic fields. Additionally, we have discovered a mechanism to reduce the intensity on interchange instabilities by the application of high-frequency electromagnetic waves. Building on the knowledge gained through this research, we are conducting new investigations using support from the DOE/NSF partnership in basic plasma science. This work aims to understand the nonlinear dynamics of strong interchange instabilities in rotating dipole-confined plasma and to observe, for the first time in a single experiment, interchange instabilities excited by magnetic curvature and driven plasma convection.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 2000
- Accession Number
- ADA392743
Entities
People
- Allen H. Boozer
- Michael E. Mauel
Organizations
- Columbia University