Study of crossed-beam energy transfer process with large crossing angle in three-dimension
Study of crossed-beam energy transfer process with large crossing angle in three-dimension
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DOI：
10.1017/s0263034616000082
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发表时间：
2016-06
影响因子：
0.9
通讯作者：
L. Hao;Huang X‐Y;C. Zheng;LI B.;J. Xiang;Z. J. Liu
中科院分区：
文献类型：
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作者：
L. Hao;Huang X‐Y;C. Zheng;LI B.;J. Xiang;Z. J. Liu
本文提出了三维（3D）模型作为LAP3D代码的新模块来研究交叉束能量转移（CBET）过程。该模型不受近轴近似的限制，可用于处理大交叉角的情况。此外，该模型还适用于多离子种类条件甚至多束流问题，这对于相关实验分析和目标设计将非常有帮助。在我们的3D模拟中，我们以60°交叉角的重叠光束为例，观察到明显的能量传递过程，这表明当满足匹配条件时，大交叉角的入射激光束之间可能会发生CBET过程。这种大交叉角 CBET 过程还可以改变束斑的空间形状，并可能对其他激光-等离子体相互作用不稳定性和黑腔中的能量对称性产生一些潜在的重要影响。
In this paper, a three-dimensional (3D) model as a new module of LAP3D code is presented to study the crossed-beam energy transfer (CBET) process. This model is not limited by the paraxial approximation and can be used to deal with a large crossing angle case. Besides, this model is also appropriate for the multi-ion species conditions and even multi-beams problems, which will be very helpful in relevant experiment analysis and the target design. In our 3D simulations, we take the overlapped beams with a 60° crossing angle as an example, and observe obvious energy transfer process, which indicates CBET process might occur between the incident laser beams with a large crossing angle when the matching condition is satisfied. This large crossing angle CBET process also can change the spatial shape of the beam spot, and may have some potential important influence on other laser–plasma interaction instabilities and the energy symmetry in hohlraum.