Two-dimensional relativistic Fokker-Planck model for core plasma heating in fast ignition targets
Two-dimensional relativistic Fokker-Planck model for core plasma heating in fast ignition targets
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DOI：
10.1063/1.2168147
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发表时间：
2006-02
影响因子：
2.2
通讯作者：
T. Yokota;Y. Nakao;T. Johzaki;K. Mima
中科院分区：
文献类型：
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作者：
T. Yokota;Y. Nakao;T. Johzaki;K. Mima
快速点火方案的关键问题之一是阐明激光产生的快电子对内爆致密堆芯的加热。为了研究堆芯的加热过程，发展了一个计算致密堆芯等离子体中快电子行为的二维相对论Fokker-Planck程序“RFP-2D”。由于库仑相互作用的快电子的能量损失不仅通过通常的短程二进制碰撞，但也长程二进制碰撞，包括集体屏蔽效应处理。在描述了物理模型之后，本文研究了快电子注入高压缩D-T圆柱形等离子体的能量沉积。远程库仑相互作用的相对重要性和自生电磁场的能量沉积剖面上的影响被证明。
One of the key issues in the fast ignition scheme is a clarification of the imploded dense core heating by laser-produced fast electrons. To investigate the core heating process, a two-dimensional relativistic Fokker-Planck code “RFP-2D” for fast electron behavior in dense core plasmas has been developed. Energy loss of fast electrons due to Coulomb interactions is treated through not only usual short-range binary collisions but also long-range binary collisions, including a collective shielding effect. After describing the physics model, an examination is made of the energy deposition of fast electrons injected into a highly compressed D-T cylindrical plasma. The relative importance of the long-range Coulomb interaction and the influence of a self-generated electromagnetic field on the energy deposition profile are demonstrated.