Particle simulation study for fast ignitor research: fast ion generation by laser plasma interaction
Particle simulation study for fast ignitor research: fast ion generation by laser plasma interaction
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DOI：
10.1016/s0920-3796(98)00325-1
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发表时间：
1999-02
影响因子：
1.7
通讯作者：
S. Miyamoto;K. Mima
中科院分区：
文献类型：
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作者：
S. Miyamoto;K. Mima
在快速点火方案中，超强激光被施加到固体密度等离子体中以加速电子。当激光光子压力超过等离子体压力时，超强激光开始加速离子。在一个相对较低的强度区域，它被发现，冲击波的形成和高能离子产生由于在冲击波阵面的反射，在高强度的情况下，激光能量直接转换为离子动能。离子加速机制的这种转变是由于激波马赫数超过其临界马赫数所致。本文讨论了离子加速的跃迁机制和能量转换效率。
In the fast ignitor scheme, an ultra intense laser is applied to accelerate an electron in a solid density plasma. When the laser photon pressure exceeds the plasma pressure, the ultra intense laser starts to accelerate the ion. In a relatively low intensity region, it is found that a shock wave is formed and high energy ions are produced due to the reflection at the shock front, in contrast with the high intensity case where the laser energy is directly converted to the ion kinetic energy. This transition of the ion acceleration mechanism results from the excess of the Mach number of the shock over its critical number. In this paper, the transition mechanism of ion acceleration and energy conversion efficiency are discussed.