Los Alamos hydrodynamic experiments on NOVA
Conference
·
OSTI ID:257457
The authors are performing experiments to study hydrodynamic perturbation growth in x-ray driven targets to test models used to analyze the stability of ignition targets. They use cylindrical implosions to directly image perturbation growth and ``feed-through`` to the inner surface in convergent geometry. The implosion trajectories and azimuthal structure of inner and outer marker layers on the cylinder are measured by axial radiography. Perturbation growth of 25 at a convergence ratio of two has been measured on the inner layer, in addition to the effects of hohlraum drive asymmetries, nonlinear mode saturation, mode coupling, and the deceleration phase of the implosion. In other experiments, they are studying the planar analog of instability coupling between the inner surface of a cryogenic ignition capsule and the ablation surface. This instability coupling mechanism provides an important seed for perturbation growth in ignition capsule implosions.
- Research Organization:
- Los Alamos National Lab., NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 257457
- Report Number(s):
- LA-UR--96-1907; CONF-9606229--8; ON: DE96012620
- Country of Publication:
- United States
- Language:
- English
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