Increase in Rosseland Mean Opacity for Inertial Fusion Hohlraum Walls
Abstract
The Rosseland mean opacity of hohlraum gold walls can be increased by filling in the low absorption gaps in the gold spectrum with one or more additional elements. Using our opacity code STA, we investigated various mixtures. A combination of gold and copper, or nickel, is equivalent or better than the previously proposed gold and gadolinium mixture, and is much easier to fabricate. Other more elaborate mixtures yield even higher opacities. Our simulations are in good agreement with experiment. At the temperatures and densities of interest, non-LTE corrections are minor, of order 10%, and not significant in view of the experimental accuracy.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 23, 1998
- Accession Number
- ADA383625
Entities
People
- D. Colombant
- M. Klapisch
Organizations
- United States Naval Research Laboratory