Dependence of Shell Mix on Feedthrough in Direct Drive Inertial Confinement Fusion
OAK-B135 The amount of plastic shell material (pusher) mixed with the hydrogen isotope fuel in the outer core of direct-drive inertial confinement fusion implosions is experimentally shown to depend on the amplitude of the initial perturbation seed for the deceleration-phase Rayleigh-Taylor (RT) instability. The seed was varied in a controlled manner by changing the level of perturbation feedthrough from the outer shell surface to the inner shell surface. Implosions with similar RT-growth factors during the deceleration phase are observed to have lower pusher mass densities in the mix region when the seed is reduced by decreasing laser imprint levels, and by imploding more-massive, thicker-shell targets.
- Research Organization:
- Laboratory for Laser Energetics (US)
- Sponsoring Organization:
- (US)
- DOE Contract Number:
- FC03-92SF19460
- OSTI ID:
- 823698
- Report Number(s):
- DOE/SF-19460-535; 1445; 2003-5; TRN: US0401803
- Journal Information:
- Physical Review Letters, Vol. 92, Issue 18; Other Information: Submitted to Physical Review Letters: Volume 92; No.18; PBD: 11 May 2004
- Country of Publication:
- United States
- Language:
- English
Similar Records
Experimental techniques for measuring Rayleigh-Taylor instability in inertial confinement fusion (ICF)
Short-Wavelength Perturbation Growth Studies for NIF Double-Shell Ignition Target Designs