Small Scale Hohlraums Useful as High Fluence X-Ray Sources

High fluence x-ray sources are needed for various high energy density physics experiments. Photon energies between a few hundred eV to ~ 100 keV are desirable in a source. One method for creating a bright source utilizes the laser heating of a small scale hohlraum target. These hohlraums have an LEH of 2208 micron and a length of 1380 micron. and are heated with 200 TW for 1.68 ns from 96 beams of the NIF laser. We report a T(rad) ~ 370 eV from these targets with a laser coupling of greater than 96%. In addition, these targets have a significant emission of ~ 20 J/sr for photon energies above 10 keV. Experimental results and comparisons with simulations will be presented. This work was done under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract No. DE-AC52-07NA27344.