Analytic scaling laws related to beam and return-current stability in particle-beam-driven ICF target regions
Abstract
Using a simplified model of a homogeneous, unbounded, time independent background plasma and an unbounded, charge and current neutralized ion beam, the linear stability of beam and return current driven modes was analyzed in parameter regimes appropriate to both light and heavy ion driven interia confinement fusion target regions. Analytic scaling laws which reveal those regions in parameter space and those models of interaction, both electrostatic and electromagnetic, which could present problems were derived. It is found that instabilities are typically not a concern until the density of background ions drops below about 0.01% of solid density. Growth rates are presented, and the stabilizing influences of beam overlap and plasma density gradients are discussed quantitatively and qualitatively.
- Publication:
-
Unknown
- Pub Date:
- March 1983
- Bibcode:
- 1983aslr.rept.....S
- Keywords:
-
- Inertial Confinement Fusion;
- Ion Beams;
- Magnetohydrodynamic Stability;
- Scaling Laws;
- Electromagnetism;
- Heavy Ions;
- Ion Density (Concentration);
- Particle Accelerator Targets;
- Plasma Density;
- Atomic and Molecular Physics