Details

Autor(en) / Beteiligte

• Ke, Y. Z.
• Yang, X. H.
• Ma, Y. Y.
• Xu, B. B.
• Ge, Z. Y.
• Gan, L. F.
• Meng, L.
• Wang, S. W.
• Kawata, S.

Titel

High-energy-density plasma jet generated by laser-cone interaction

Ist Teil von

• Physics of plasmas, 2018-04, Vol.25 (4)

Erscheinungsjahr

2018

Beschreibungen/Notizen

• The generation of high-energy-density (HED) plasma jet from a laser ablating thin cone target is studied theoretically and by numerical simulations. Theoretical analysis and 1D simulations show that a maximum kinetic energy conversion efficiency (CE) of 26% can be achieved when nearly 80% of the foil is ablated by laser. A HED plasma jet is generated when an intense laser (∼1015 W/cm2) irradiates the cone target, inducing a great enhancement of energy density compared to that of the planar target, which is attributed to the cumulative effect of the cone shape and the new generation mechanism of jet, i.e., laser directly accelerating the cone wall onto the axis. The characteristic of jet is influenced by the cone geometry, i.e., thickness and cone angle. It is found that a cone with a half opening angle around 70° and the optimized thickness (∼5 μm) can induce a jet with a high CE and long duration, whose peak energy density can reach 3.5 × 1015 erg/cm3. The results can be beneficial for laser-driven novel neutron sources and other fusion related experiments, where HED plasma jet can be applied.