Survey of ion-acoustic-instability particle simulations and relevance to laser-fusion thermal-transport inhibition
Ion acoustic turbulence is examined as one mechanism which could contribute to the inhibition of electron thermal transport which has been inferred from many laser-plasma experiments. The behavior of the ion acoustic instability is discussed from the viewpoint of the literature of 2-dimensional particle-in-cell simulations. Simulation techniques, limitations, and reported saturation mechanisms and levels are discussed. A scaling law for the effective collision frequency ..nu..* can be fit to several workers' results to within an order-of-magnitude. The inferred ..nu..* is shown to be 1-2 orders-of-magnitude too small to account for the transport inhibition seen in Nd-laser-produced plasmas. Several differences between the simulation conditions and laser-produced plasma conditions are noted.
- Research Organization:
- California Univ., Livermore (USA). Lawrence Livermore Lab.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6590586
- Report Number(s):
- UCRL-85246; CONF-7908142-1; TRN: 81-006505
- Resource Relation:
- Conference: CECAM workshop on fast electron transport, Orsay, France, 14 Aug 1979
- Country of Publication:
- United States
- Language:
- English
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