Review of recent experimental and modeling progress in the lower hybrid range of frequencies at ITER relevant parameters
Review of recent experimental and modeling progress in the lower hybrid range of frequencies at ITER relevant parameters
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DOI：
10.1063/1.4884360
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发表时间：
2014-02
影响因子：
2.2
通讯作者：
P. Bonoli
中科院分区：
文献类型：
--
作者：
P. Bonoli
综述了ITER相关参数在低混合频率范围内的实验和模拟能力方面的进展。在反应堆装置中使用液力发电的动机是因为它具有有效的离轴电流分布控制的潜力。讨论了最近在模拟能力方面的改进，包括全波场解算器的发展，在波传播程序中加入刮离层(SOL)，耦合射线跟踪/全波/3D(r v⊥，v//)福克-普朗克模型的使用，以及在射线跟踪/福克-普朗克程序中包括波散射和非线性加宽效应。综述了实验和模拟结果，这些结果旨在了解激光电流驱动(LHCD)中的光谱带隙问题，以及在LHCD实验中观察到的和减轻的密度限制。讨论了可用于这些实验的物理机制，包括环面引起的平行波数变化、泵浦光波的非线性展宽。
Progress in experiment and simulation capability in the lower hybrid range of frequencies at ITER relevant parameters is reviewed. Use of LH power in reactor devices is motivated in terms of its potential for efficient off-axis current profile control. Recent improvements in simulation capability including the development of full-wave field solvers, inclusion of the scrape off layer (SOL) in wave propagation codes, the use of coupled ray tracing/full-wave/3D (r v⊥, v//) Fokker Planck models, and the inclusion of wave scattering as well as nonlinear broadening effects in ray tracing / Fokker Planck codes are discussed. Experimental and modeling results are reviewed which are aimed at understanding the spectral gap problem in LH current drive (LHCD) and the density limit that has been observed and mitigated in LHCD experiments. Physics mechanisms that could be operative in these experiments are discussed, including toroidally induced variations in the parallel wavenumber, nonlinear broadening of the pump wa...