1. Correlations between asymmetric compression, burn amplification, and hot-spot velocities in inertial confinement fusion implosions.
- Author
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Nora, R. C., Birge, N., Casey, D., Danly, C., Dewald, E. L., Djordjevic, B. Z., Do, A., Durocher, M., Field, J. E., Fittinghoff, D., Freeman, M. S., Gaffney, J., Geppert Kleinrath, V., Haan, S., Hahn, K., Hartouni, E., Hohenberger, M., Kerr, S., Landen, O. L., and Milovich, J.
- Subjects
INERTIAL confinement fusion ,IMPLOSIONS ,KINETIC energy ,VELOCITY - Abstract
This manuscript examines the correlations between the hot-spot velocity (an observable signature of residual kinetic energy), low-mode implosion asymmetries, and burn amplification in inertial confinement fusion implosions on the National Ignition Facility (NIF). Using a combination of two-dimensional axis-symmetric and three-dimensional radiation-hydrodynamic simulations coupled to neutronics, we find that for typical NIF implosions, the stagnation asymmetry multiplies the observed hot-spot velocity anywhere from 80% to 120%, while burn amplification always increases it. Additionally, we find stagnation asymmetry typically deflects the observed hot-spot flow. The two mechanisms (low-mode implosion asymmetries and burn amplification) can be decoupled, and application of a simple model to a database of cryogenic implosions on the NIF infers the total hot-spot velocity amplification. This finding modifies the interpretation of data collected from inertial confinement fusion experiments and impacts the magnitude and origin of low-mode asymmetries. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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