High-performance finite-difference time-domain simulations of C-Mod and ITER RF antennas
High-performance finite-difference time-domain simulations of C-Mod and ITER RF antennas
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DOI：
10.1063/1.4936468
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发表时间：
2015-12
期刊：
影响因子：
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通讯作者：
T. Jenkins;D. Smithe
中科院分区：
文献类型：
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作者：
T. Jenkins;D. Smithe
近几年来，时域差分方法已经发展出强大的能力来模拟聚变等离子体中真实的ICRF行为[1，2，3，4]。当与现代高性能计算平台的能力相结合时，这种技术允许在现实的实验场景中以以前无法达到的分辨率水平研究天线近场和远场的行为以及RF功率的流动。在这次演讲中，我们介绍了在Titan Cray XK 7超级计算机上进行高性能FDTD模拟的结果和3D动画，对Alcator C-Mod的场对准ICRF天线和ITER天线模块进行建模。这项工作的大部分集中在扫描边缘密度，和定制的边缘密度分布，研究色散和物理的慢波激励在天线硬件和SOL附近。对低密度情况下低混合谐振作用的理解正在出现，这对NSTX发射器和功率放大器可能产生的影响...
Finite-difference time-domain methods have, in recent years, developed powerful capabilities for modeling realistic ICRF behavior in fusion plasmas [1, 2, 3, 4]. When coupled with the power of modern high-performance computing platforms, such techniques allow the behavior of antenna near and far fields, and the flow of RF power, to be studied in realistic experimental scenarios at previously inaccessible levels of resolution. In this talk, we present results and 3D animations from high-performance FDTD simulations on the Titan Cray XK7 supercomputer, modeling both Alcator C-Mod’s field-aligned ICRF antenna and the ITER antenna module. Much of this work focuses on scans over edge density, and tailored edge density profiles, to study dispersion and the physics of slow wave excitation in the immediate vicinity of the antenna hardware and SOL. An understanding of the role of the lower-hybrid resonance in low-density scenarios is emerging, and possible implications of this for the NSTX launcher and power balan...