Magnetically Assisted Fast Ignition
Magnetically Assisted Fast Ignition
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磁力辅助快速点火
DOI：
10.1103/physrevlett.114.015001
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发表时间：
2015
影响因子：
8.6
通讯作者：
Li Y. -T.
中科院分区：
文献类型：
--
作者：
Wang W. -M.;Gibbon P.;Sheng Z. -M.;Li Y. -T.
通过集成的细胞内粒子模拟研究快速点火 (FI)，包括快速电子的生成和传输，其中采用 2 ps 的拍瓦点火激光器以及核心峰值密度和面密度的压缩目标。当在传统的无锥目标上施加 20 MG 的静磁场时，从激光到核心的能量耦合增强了七倍，达到 14%。该值甚至超过了使用锥体插入靶获得的值，表明磁辅助方案可能是 FI 的可行替代方案。通过该方案，证明了两个沿磁场反向传播的 6 ps、6 kJ 激光器将 12% 的能量转移到核心，然后将其加热到 3 keV。
Fast ignition (FI) is investigated via integrated particle-in-cell simulation including both generation and transport of fast electrons, where petawatt ignition lasers of 2 ps and compressed targets of a peak density ofand areal density ofat the core are taken. When a 20 MG static magnetic field is imposed across a conventional cone-free target, the energy coupling from the laser to the core is enhanced by sevenfold and reaches 14%. This value even exceeds that obtained using a cone-inserted target, suggesting that the magnetically assisted scheme may be a viable alternative for FI. With this scheme, it is demonstrated that two counterpropagating, 6 ps, 6 kJ lasers along the magnetic field transfer 12% of their energy to the core, which is then heated to 3 keV.