Details

Autor(en) / Beteiligte

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

Titel

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

Ist Teil von

• Physical review letters, 2012-04, Vol.108 (16), p.165003-165003, Article 165003

Ort / Verlag

United States: American Physical Society (APS)

Erscheinungsjahr

2012

Quelle

PROLA

Beschreibungen/Notizen

• 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 400 μm at n(cr)/4 in planar CH targets allowed the two-plasmon-decay instability to be driven to saturation for vacuum intensities above ~3.5×10(14) W cm(-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 90 keV as the laser beam intensity is increased from 2 to 7×10(14) W cm(-2). This increase in the hot-electron temperature is compared with predictions from nonlinear Zakharov models.