Accession Number:

ADA383625

Title:

Increase in Rosseland Mean Opacity for Inertial Fusion Hohlraum Walls

Descriptive Note:

Interim rept.

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC BEAM PHYSICS BRANCH

Personal Author(s):

Report Date:

1998-03-23

Pagination or Media Count:

27.0

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.

Subject Categories:

  • Lasers and Masers
  • Properties of Metals and Alloys
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE