Modeling the spectral modification of lower hybrid wave in the presence of drift-wave type density fluctuation in the scrape-off-layer of the EAST tokamak
Modeling the spectral modification of lower hybrid wave in the presence of drift-wave type density fluctuation in the scrape-off-layer of the EAST tokamak
复制标题
模拟 EAST 托卡马克刮离层存在漂移波型密度涨落时低混合波的光谱修正
DOI：
10.1063/5.0053459
复制
发表时间：
2021-08
影响因子：
2.2
通讯作者：
Liu S. C.
中科院分区：
文献类型：
--
作者：
Wu C. B.;Ding B. J.;Li M. H.;Baek S. G.;Wallace G. M.;Li Y. C.;Yan G. H.;Liu S. C.
应用Bonoli和Ott [Phys.Fluids 25，359（1982）]开发的波散射模型，通过Monte Carlo方法，研究了刮除层中低频密度波动引起的低杂波（LH）的频谱变化。由于密度涨落的影响，LH波矢的垂直分量在二维垂直空间中发生旋转，进而改变LH波的射线轨迹。为此建立了一个光线追迹模型，计算了LH波在最后一个闭合通量面（LCFS）上的极向折射率（Nθ）和平行折射率（N θ）的概率分布。散射几率和旋转散射角由LH张量元中的几何光学近似项和E×B漂移项的综合作用决定。利用EAST参数研究了LCFS中N θ和Nθ的概率分布随波频率、初始N θ和极性注入位置的变化，这些参数可能会影响低混杂电流驱动效率。
The spectrum change of the lower hybrid (LH) waves caused by a low-frequency density fluctuation in the scrape-off-layer is studied by applying the wave scattering model developed by Bonoli and Ott [Phys. Fluids 25, 359 (1982)] via a Monte Carlo method. Due to the influence of the density fluctuation, the perpendicular component of the LH wave-vector can be rotated in the 2D perpendicular space, which will further change the ray trajectory of the LH wave. A ray-tracing model specific to this purpose is developed to evaluate the probability distribution of both the poloidal refractive index (Nθ) and the parallel refractive index ( N∥) of the LH wave at the last closed flux surface (LCFS). The scattering probability and the rotation scattering angle are determined by the combined effect from the geometric optics approximation term and the E×B drift term in the LH tensor elements. The probability distributions of N∥ and Nθ at the LCFS are studied using the EAST parameters as a function of wave frequency, the initial N∥, and the polar injection position, which may influence the lower hybrid current drive efficiency.
登录
查看更多内容
影响因子：
4.6
作者：
E. Ott
通讯作者：
E. Ott
影响因子：
3.3
作者：
C. Castaldo;A. Di Siena;R. Fedele;F. Napoli;L. Amicucci;R. Cesario;G. Schettini
通讯作者：
C. Castaldo;A. Di Siena;R. Fedele;F. Napoli;L. Amicucci;R. Cesario;G. Schettini
DOI：
10.2172/4096559
发表时间：
1976-02
期刊：
--
影响因子：
--
作者：
E. Mazzucato
通讯作者：
E. Mazzucato
影响因子：
2.2
作者：
Ram, Abhay K.;Hizanidis, Kyriakos
通讯作者：
Hizanidis, Kyriakos
影响因子：
3.3
作者：
G. Pereverzev
通讯作者：
G. Pereverzev