Details

Autor(en) / Beteiligte

• Follett, R K
• Delettrez, J A
• Edgell, D H
• Goncharov, V N
• Henchen, R J
• Katz, J
• Michel, D T
• Myatt, J F
• Shaw, J
• Solodov, A A
• Stoeckl, C
• Yaakobi, B
• Froula, D H

Titel

Two-Plasmon Decay Mitigation in Direct-Drive Inertial-Confinement-Fusion Experiments Using Multilayer Targets

Ist Teil von

• Physical review letters, 2016-04, Vol.116 (15), p.155002-155002, Article 155002

Ort / Verlag

United States: American Physical Society (APS)

Erscheinungsjahr

2016

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• Multilayer direct-drive inertial-confinement-fusion targets are shown to significantly reduce two-plasmon decay (TPD) driven hot-electron production while maintaining high hydrodynamic efficiency. Implosion experiments on the OMEGA laser used targets with silicon layered between an inner beryllium and outer silicon-doped plastic ablator. A factor-of-5 reduction in hot-electron generation (>50  keV) was observed in the multilayer targets relative to pure CH targets. Three-dimensional simulations of the TPD-driven hot-electron production using a laser-plasma interaction code (lpse) that includes nonlinear and kinetic effects show good agreement with the measurements. The simulations suggest that the reduction in hot-electron production observed in the multilayer targets is primarily caused by increased electron-ion collisional damping.