Journal
PHYSICAL REVIEW LETTERS
Volume 108, Issue 17, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.175002
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Funding
- DOE [DE-FG02-06ER54879, DE-FG52-09NA29552, DE-FC52-08NA28302]
- NSF [PHY-0903797, PHY-0904039]
- NSFC [11129503]
- Division Of Physics
- Direct For Mathematical & Physical Scien [903797] Funding Source: National Science Foundation
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A new hot-electron generation mechanism in two-plasmon-decay instabilities is described based on a series of 2D, long-term (similar to 10 ps) particle-in-cell and fluid simulations under parameters relevant to inertial confinement fusion. The simulations show that significant laser absorption and hot-electron generation occur in the nonlinear stage. The hot electrons are stage accelerated from the low-density region to the high-density region. New modes with small phase velocities develop in the low-density region in the nonlinear stage and form the first stage for electron acceleration. Electron-ion collisions are shown to significantly reduce the efficiency of this acceleration mechanism.
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