The effects of fluid instabilities on laser fusion pellets
Abstract
Linear perturbation computer codes (LASNEX) are developed for direct two-dimensional simulation of fluid flow and plasma behavior, laser light absorption by inverse bremsstrahlung and via plasma instabilities, energy transport and partition, and ion and electron radiation, in laser-induced implosion of D-T pellets. Effects of fluid instability on laser fusion targets, criteria for optimizing an implosion to survive breakup of the pellet shell (in the absence of strong ablative stabilization), and effects of surface finish and aspect ratio of pellet shells are examined. Simulation tests are staged without ablation and with zoning of the waveform. The usefulness of an atmosphere around the pellet capable of reducing the imprint from nonuniform illumination to tolerable levels is considered.
- Publication:
-
Progress in lasers and laser fusion; Proceedings of the Second Orbis Scientiae
- Pub Date:
- 1975
- Bibcode:
- 1975pllf.proc...27M
- Keywords:
-
- Computer Techniques;
- Controlled Fusion;
- Flow Stability;
- Laser Applications;
- Laser Plasmas;
- Nuclear Fuels;
- Amplitudes;
- Fluid Dynamics;
- Implosions;
- Isentropic Processes;
- Pellets;
- Perturbation Theory;
- Pulsed Lasers;
- Time Response;
- Two Dimensional Models;
- Lasers and Masers