Edge localized mode suppression and plasma response using mixed toroidal harmonic resonant magnetic perturbations in DIII-D
Edge localized mode suppression and plasma response using mixed toroidal harmonic resonant magnetic perturbations in DIII-D
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DIII-D 中使用混合环形谐振磁扰的边缘局域模式抑制和等离子体响应
DOI：
10.1088/1741-4326/aaf5a3
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发表时间：
2019-01
期刊：
影响因子：
3.3
通讯作者：
T. Shi
中科院分区：
文献类型：
--
作者：
S. Gu;Y. Sun;C. Paz-Soldan;R. Nazikian;M. Jia;H.H. Wang;W. Guo;Y.Q. Liu;T. Abrams;L. Cui;T. Evans;A. Garofalo;X. Gong;N.C. Logan;S. Munaretto;D. Orlov;T. Shi
在DIII-D托卡马克装置上，利用混合环形和三次谐波共振磁微扰（RMP）实现了边缘局域模（ELM）的抑制。这里是环形模数。据观察，混合环形谐波RMP降低ELM抑制的阈值电流相比，单一的情况下。降低的阈值表明，混合环形谐波RMP为ELM控制提供了更好的路径。通过在相位扫描上叠加误差场校正，研究了误差场效应，结果表明可以同时抑制ELM和校正误差场。磁传感器测量的等离子体响应表明，谐波在混合环谐波RMP抑制ELM中起着关键作用。在ELM从缓解到抑制的分叉期间观察到等离子体响应的非线性跳跃，类似于Nazikian等人（2015 Phys. Rev. Lett. 114 5）。磁流体动力学模拟，使用环形旋转找到良好的协议与ELM缓解阶段时，输入的旋转配置文件是高的，并引起强屏蔽的RMP。零交叉旋转的模拟发现了RMP的强穿透性，并在低场和高场侧再现了ELM抑制的模式结构。这表明，在从ELM缓解到抑制的过渡期间，边缘分量可能会渗透。
Edge localized mode (ELM) suppression has been achieved in the DIII-D tokamak using mixed toroidal and 3 harmonic resonant magnetic perturbations (RMPs). Here is the toroidal mode number. It is observed that mixed toroidal harmonic RMPs lower the threshold current for ELM suppression compared to the single case. The decreased threshold suggests that mixed toroidal harmonic RMPs offer a better path to ELM control. The error field effect is studied by superimposing error field correction upon the phase scan, which shows that it is possible to suppress the ELM and correct the error field simultaneously. The plasma response measured by magnetic sensors shows the harmonic plays a key role in ELM suppression using mixed toroidal harmonic RMPs. A nonlinear jump in the plasma response is observed during the bifurcation from mitigation to suppression of ELMs, similar to the results reported in Nazikian et al (2015 Phys. Rev. Lett. 114 5). Magneto-hydrodynamic simulations using toroidal rotation find good agreement with the ELM mitigated phase when the input rotation profile is high and induces strong screening of the RMP. Simulations with zero-crossing rotation find strong penetration of the RMP and reproduce the mode structure of ELM suppression on both the low and high field side. This suggests that edge components may penetrate during the transition from ELM mitigation to suppression.
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影响因子：
2.2
作者：
S. Haskey;M. Lanctot;Y. Liu;J. Hanson;B. Blackwell;R. Nazikian
通讯作者：
S. Haskey;M. Lanctot;Y. Liu;J. Hanson;B. Blackwell;R. Nazikian
影响因子：
3.3
作者：
Huihui Wang;Youwen Sun;J. Qian;T. Shi;B. Shen;S. Gu;Yueqiang Liu;Wenfeng Guo;N. Chu;
通讯作者：
Huihui Wang;Youwen Sun;J. Qian;T. Shi;B. Shen;S. Gu;Yueqiang Liu;Wenfeng Guo;N. Chu;
基于等离子体对 RMP 场响应的环形模型的 ELM 控制比较研究
影响因子：
2.2
作者：
Liu Yueqiang;Kirk A.;Li Li;In Y.;Nazikian R.;Sun Youwen;Suttrop W.;Lyons B.;Ryan D.;Wang Shuo;Yang Xu;Zhou Lina
通讯作者：
Zhou Lina
影响因子：
3.3
作者：
A. Kirk;W. Suttrop;Yueqiang Liu;I. Chapman;P. Cahyna;T.Eich;C.Fuchs;C.Ham;J. Harrison
通讯作者：
A. Kirk;W. Suttrop;Yueqiang Liu;I. Chapman;P. Cahyna;T.Eich;C.Fuchs;C.Ham;J. Harrison
影响因子：
3.3
作者：
Yueqiang Liu;A. Kirk;Y. Gribov;M. Gryaznevich;T. Hender;E. Nardon
通讯作者：
Yueqiang Liu;A. Kirk;Y. Gribov;M. Gryaznevich;T. Hender;E. Nardon