On Optimizing K-Shell X-ray Conversion Efficiencies with New Nano-structured Laser Targets
POSTER
Abstract
We have begun developing new nano-fabrication techniques to make suitable laser targets that can form highly uniform high-Z non-LTE plasmas when illuminated by high-intensity laser light. In this presentation we first discuss progress in developing very low-density pure Cu foams via a four-step ion-lithography process and progress in mechanically trapping Cu nanowires in a silica aerogel foam. We then discuss the radiation-hydrodynamics and non-LTE atomic physics modeling of various targets we could assemble from these foams, and what the modeling reveals about how best to optimize Cu K-shell x-ray conversion efficiencies via target design.
*This work was performed under the auspices of the U.S. Department of Energy by LLNL under Contract No. DE-AC52-07NA27344, with funding from a Basic Research grant from the U.S. Defense Threat Reduction Agency.