期刊
PHYSICAL REVIEW LETTERS
卷 114, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.114.025001
关键词
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资金
- United States Department of Energy National Nuclear Security Administration [DE-NA0001857]
- Fusion Science Center [415023-G]
- National Laser Users Facility Program [DE-NA0002035]
- Laboratory for Laser Energetics [415935-G]
- Lawrence Livermore National Laboratory [B600100]
Anomalous reduction of the fusion yields by 50% and anomalous scaling of the burn-averaged ion temperatures with the ion-species fraction has been observed for the first time in (DHe)-He-3-filled shock-driven inertial confinement fusion implosions. Two ion kinetic mechanisms are used to explain the anomalous observations: thermal decoupling of the D and He-3 populations and diffusive species separation. The observed insensitivity of ion temperature to a varying deuterium fraction is shown to be a signature of ion thermal decoupling in shock-heated plasmas. The burn-averaged deuterium fraction calculated from the experimental data demonstrates a reduction in the average core deuterium density, as predicted by simulations that use a diffusion model. Accounting for each of these effects in simulations reproduces the observed yield trends.
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