Saturation of the two-plasmon decay instability in long-scale-length plasmas relevant to direct-drive inertial confinement fusion

D. H. Froula, B. Yaakobi, S. X. Hu, P. Y. Chang, R. S. Craxton, D. H. Edgell, R. Follett, D. T. Michel, J. F. Myatt, W. Seka, R. W. Short, A. Solodov, C. Stoeckl

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43 引文 斯高帕斯(Scopus)

摘要

Measurements of the hot-electron generation by the two-plasmon-decay instability are made in plasmas relevant to direct-drive inertial confinement fusion. Density-scale lengths of 400μm at n cr/4 in planar CH targets allowed the two-plasmon-decay instability to be driven to saturation for vacuum intensities above ∼3.5×1014Wcm -2. In the saturated regime, ∼1% of the laser energy is converted to hot electrons. The hot-electron temperature is measured to increase rapidly from 25 to 90keV as the laser beam intensity is increased from 2 to 7×1014Wcm -2. This increase in the hot-electron temperature is compared with predictions from nonlinear Zakharov models.

原文English
文章編號165003
期刊Physical review letters
108
發行號16
DOIs
出版狀態Published - 2012 四月 18

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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