Late-time hohlraum pressure dynamics in supernova remnant experiments

It is shown that laser driven hohlraums obtain significant internal pressur es which affect the hydrodynamics of high-energy density shock-tube experim ents. By incorporating this previously neglected hohlraum pressure effect ( in addition to the usual x-ray drive) into computer simulations which model the NOVA laser driven supernova remnant experiment [R. P. Drake, S. G. Gle ndinning, K. Estabrook, B. A. Remington, R. McCray, R. J. Williams, L. J. S uter, T. B. Smith, J. J. Carroll III, R. A. London, and E. Liang, Phys. Rev . Lett. 81, 2068 (1998)], calculations are able to reproduce the observed s tructure of hydrodynamic features. (C) 2001 American Institute of Physics.