The development of laser-plasma interaction program LAP3D on thousands of processors
The development of laser-plasma interaction program LAP3D on thousands of processors
复制标题
在数千个处理器上开发激光-等离子体交互程序LAP3D
DOI：
10.1063/1.4929775
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发表时间：
2015-08
期刊：
影响因子：
1.6
通讯作者：
Guo, Hong
中科院分区：
文献类型：
--
作者：
Liu, Zhanjun;Zheng, Chunyang;Li, Bin;Guo, Hong
在实验尺度上模拟激光等离子体相互作用过程是一项具有挑战性的任务。为了探索LPI过程中各种不稳定性的影响，开发了三维激光和等离子体代码（LAP3D），其中包括丝化、受激布里渊后向散射（SBS）、受激拉曼后向散射（SRS）、非局部热输运和等离子体流计算模块。该程序采用二阶迎风格式求解欧拉流体模型所表示的等离子体方程。采用算子分裂法求解光波传播方程，其中利用快速傅立叶平移（FFT）计算衍射算子，利用坐标平移求解声波方程。利用二阶插值算法计算了不同物理过程的耦合项。为了在大规模并行计算机上很好地模拟LPI过程，使用了几种并行技术，如FFT和流体数值计算的耦合并行算法、负载平衡算法和数据传输算法。目前，利用LAP3D技术成功地研究了低密度等离子体中的成丝、SBS和SRS现象。该程序的可扩展性得到了验证，在大约一万个处理器上并行效率超过50%。
Modeling laser-plasma interaction (LPI) processes in real-size experiments scale is recognized as a challenging task. For explorering the influence of various instabilities in LPI processes, a three-dimensional laser and plasma code (LAP3D) has been developed, which includes filamentation, stimulated Brillouin backscattering (SBS), stimulated Raman backscattering (SRS), non-local heat transport and plasmas flow computation modules. In this program, a second-order upwind scheme is applied to solve the plasma equations which are represented by an Euler fluid model. Operator splitting method is used for solving the equations of the light wave propagation, where the Fast Fourier translation (FFT) is applied to compute the diffraction operator and the coordinate translations is used to solve the acoustic wave equation. The coupled terms of the different physics processes are computed by the second-order interpolations algorithm. In order to simulate the LPI processes in massively parallel computers well, several parallel techniques are used, such as the coupled parallel algorithm of FFT and fluid numerical computation, the load balance algorithm, and the data transfer algorithm. Now the phenomena of filamentation, SBS and SRS have been studied in low-density plasma successfully with LAP3D. Scalability of the program is demonstrated with a parallel efficiency above 50% on about ten thousand of processors.
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影响因子：
2.2
作者：
C. Still;R. Berger;A. Langdon;D. Hinkel;L. Suter;E. Williams
通讯作者：
C. Still;R. Berger;A. Langdon;D. Hinkel;L. Suter;E. Williams
强阻尼条件下受激拉曼散射与布里渊散射的竞争
影响因子：
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作者：
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通讯作者：
Zheng, C. Y.
影响因子：
2.5
作者：
P. Ballereau;M. Casanova;F. Duboc;D. Dureau;H. Jourdren;P. Loiseau;J. Métral;O. Morice;R. Sentis
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P. Ballereau;M. Casanova;F. Duboc;D. Dureau;H. Jourdren;P. Loiseau;J. Métral;O. Morice;R. Sentis
影响因子：
2.2
作者：
R. Berger;C. Still;E. Williams;A. Langdon
通讯作者：
R. Berger;C. Still;E. Williams;A. Langdon
影响因子：
8.6
作者：
A. Langdon;B. Lasinski
通讯作者：
A. Langdon;B. Lasinski