High-Energy Ion Expansion in Laser-Plasma Interactions.
Abstract
The high-energy ions produced from the intense laser irradiation 10 to the 16th power W/sq. cm. at 1.06 micrometers of solid targets are studied both experimentally and theoretically. The ion diagnostics includes both charge collectors and an ion analyzer especially designed for energetic ion studies. Analyzer design considerations are presented together with a calibration technique of the ion detection system involving the measurement of secondary electron emission. A technique using charge exchange to differentiate ion species with the same A/Z but using different Z is also described. A 1-D fluid model describes the ambipolar expansion of hot electrons and either one or two relatively cold ion species from an electron pressure gradient. For CD sub n, the plasma expansion is adequately represented by a single ion species, whereas for CH sub n, two-ion fluids are required to account for the energy and the relative behavior of the high-energy ion species.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1978
- Accession Number
- ADA057439
Entities
People
- Real Decoste
Organizations
- United States Naval Research Laboratory