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Session CO1 - Compression and Burn.
ORAL session, Monday afternoon, November 15
Room 201/202, SCC

[CO1.008] Measurements of hot spot energy in capsule implosions driven by dynamic hohlraum x-rays

J.E. Bailey, G.A. Chandler, S.A. Slutz, P.W. Lake, R.J. Leeper, T.A. Mehlhorn, T.J. Nash, K. Peterson, G.A. Rochau, C.L. Ruiz, W.S. Varnum (Sandia National Laboratories, Albuquerque, NM, 87185-1196), R.C. Mancini, T.J. Buris-Mog (U. of Nevada, Reno, NV), I. Golovkin, J.J. MacFarlane (Prism Computational Sciences, Madison, WI), G.S. Dunham, T.C. Moore (K-Tech Corp., Albu., NM), G. Cooper (U. of New Mexico, Albu., NM), D.G. Schroen (Schafer Corp., Livermore, CA)

The hot spot energy in ICF implosions can be estimated from measurements of the temperature, density, and volume provided by time- and space-resolved Ar tracer spectroscopy. The method is applied to experiments using 2-mm-diameter 40-80-micron-thick CH wall capsules filled with 10-25 atm D_2 + 0.085 atm Ar. The capsules implode when they absorb 20-40 kJ of x-rays in a dynamic hohlraum configuration. Preliminary analysis using a uniform core approximation indicates that the hot spot energy is 300-800 J in these relatively thin wall capsule experiments. Refinement to include spatial core gradients, simulation comparisons, and the possibility of increasing the efficiency will be discussed. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the U.S. Dept. of Energy under contract No. DE-AC04-94AL85000.

Part C of program listing