Study of energetic particle physics with advanced ECEI system on the HL-2A tokamak

Study of energetic particle physics with advanced ECEI system on the HL-2A tokamak
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在HL-2A托卡马克上利用先进的ECEI系统进行高能粒子物理研究

DOI:
10.1051/epjconf/201714701003
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发表时间:
2017-07
期刊:
EPJ Web of Conferences 147, 01003 (2017)
影响因子:
--
通讯作者:
Zhongbing Shi
Zhongbing Shi
中科院分区:
其他
文献类型:
--
作者:
Zhongbing Shi

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了解高能粒子的物理特性对于下一代聚变装置(如ITER)中的燃烧等离子体至关重要。本文利用HL-2A装置上新研制的24(极向)× 16(径向)= 384通道ECEI系统,研究了ECRH/ECCD加热过程中低密度放电中高能粒子激发的三种内扭结模(饱和内扭结模(SK)、共振内扭结模(RK)和双e鱼骨模)。SK和RK在电子反磁方向上极向旋转,并被高能俘获电子所破坏。在qmin> 1的情况下,SK不稳定,而在qmin < 1的情况下,RK不稳定。在反ECCD等离子体电流上升过程中,观察到了双e-鱼骨结构,即两个om/n= 1/1模沿极向相反方向传播。研究了两个om/n= 1/1模之间的强热传递和模耦合。
Understanding the physics of energetic particles (EP) is crucial for the burning plasmas in next generation fusion devices such as ITER. In this work, three types of internal kink modes (a saturated internal kink mode (SK), a resonant internal kink mode (RK), and a double e-fishbone) excited by energetic particles in the low density discharges during ECRH/ECCD heating have been studied by the newly developed 24(poloidal) × 16(radial) = 384 channel ECEI system on the HL-2A tokamak. The SK and RK rotate in the electron diamagnetic direction poloidally and are destabilized by the energetic trapped electrons. The SK is destabilized in the case ofqmin> 1, while the RK is destabilized in the case ofqmin< 1. The double e-fishbone, which has twom/n= 1/1 modes propagating in the opposite directions poloidally, has been observed during plasma current ramp-up with counter-ECCD. Strong thermal transfer and mode coupling between the twom/n= 1/1 modes have been studied.
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