Role of hydrodynamic instability growth in hot-spot mass gain and fusion performance of inertial confinement fusion implosions

Journal Article · Wed Oct 15 00:00:00 EDT 2014 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4897938· OSTI ID:22300239

Srinivasan, Bhuvana ^[1]; Tang, Xian-Zhu ^[1]

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1. Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

In an inertial confinement fusion target, energy loss due to thermal conduction from the hot-spot will inevitably ablate fuel ice into the hot-spot, resulting in a more massive but cooler hot-spot, which negatively impacts fusion yield. Hydrodynamic mix due to Rayleigh-Taylor instability at the gas-ice interface can aggravate the problem via an increased gas-ice interfacial area across which energy transfer from the hot-spot and ice can be enhanced. Here, this mix-enhanced transport effect on hot-spot fusion-performance degradation is quantified using contrasting 1D and 2D hydrodynamic simulations, and its dependence on effective acceleration, Atwood number, and ablation speed is identified.

• OSTI ID: 22300239
• Journal Information: Physics of Plasmas, Vol. 21, Issue 10; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTRON BEAM TARGETS
ENERGY LOSSES
HOT SPOTS
ICES PROGRAM
IMPACT FUSION
INERTIAL CONFINEMENT
ION BEAM TARGETS
LASER TARGETS
PERFORMANCE
RAYLEIGH-TAYLOR INSTABILITY
SIMULATION
THERMAL CONDUCTION