JT-60U 及JT-60SA 运行条件下高能量粒子激发的离散阿尔芬本征模

核聚变与等离子体物理 ›› 2013, Vol. 33 ›› Issue (2): 113-120.

JT-60U 及JT-60SA 运行条件下高能量粒子激发的离散阿尔芬本征模

孔冉，胡双辉，王帅，王一如，陈淑平

(贵州大学理学院，贵阳 550025)

收稿日期:2012-09-17 修回日期:2013-02-03 出版日期:2013-06-15 发布日期:2013-06-14
作者简介:孔冉(1985-)，女，山东曲阜人，硕士研究生，等离子体物理专业。
基金资助:
托卡马克中低频阿尔芬连续谱及其相关的不稳定性(10975039)

Discrete Afvén eigenmodes excited by energetic particles in JT-60U and JT-60SA

KONG Ran, HU Shuang-hui, WANG Shuai, WANG Yi-ru, CHEN Shu-ping

(Department of Physics, College of Science, Guizhou University, Guiyang 550025)

Received:2012-09-17 Revised:2013-02-03 Online:2013-06-15 Published:2013-06-14

摘要/Abstract

摘要：

运用线性回旋动力学与磁流体力学的混合模拟程序，研究了JT-60U 和JT-60SA 装置中高能量粒子对离散阿尔芬本征模的共振激发。发现了丰富的αTAE 动力学不稳定模式，研究了它的不稳定特性对高能量粒子速度的依赖关系。发现在JT-60U 高β_p ELMy H 模运行中有grassy ELM 的放电比有gaint ELM 的放电更容易被高能量粒子激发成不稳定模式，在有边缘L 模存在的负剪切运行下的各个势阱中都存在高能量粒子激发的αTAE 不稳定模式。另外在JT-60SA 中高β_p全非感应电流驱动下的模拟实验放电下也发现了丰富的αTAE 不稳定模式，观察了αTAE 在该装置中沿磁场线和径向两个方向的二维广域本征模特性。

关键词: 阿尔芬波, 高能量粒子, 托卡马克, 不稳定性

Abstract:

Resonant excitations of Afvén eigenmodes by energetic particles in JT-60U and JT-60SA are investigated employing a gyrokinetic-magnetohydrodynamic (MHD) hybrid simulation code. It is found that multiple branches of αTAEs can be kinetically destabilized by energetic particles. The dependences of stability properties on energetic-particle beam velocity via resonance conditions are examined. The discrete Afvén eigenmodes in high β_p grassy ELM H mode regime are easier to be excited by energetic particles than in high β_p gaint ELM H mode regime. The discrete Afvén eigenmodes excited by energetic particles are shown to exist in diffrent potential wells in reversed magnetic shear discharges with an L-mode edge. The kinetically excited αTAE instabilities are also found in high β_p full non-inductive operation in JT-60SA. The global αTAE features are demonstrated along the magnetic field line and the radial direction.

Key words: Afvén wave, Energetic particles, Tokamak, Instabilities

中图分类号:

TL61+2.2

孔冉，胡双辉，王帅，王一如，陈淑平. JT-60U 及JT-60SA 运行条件下高能量粒子激发的离散阿尔芬本征模[J]. 核聚变与等离子体物理, 2013, 33(2): 113-120.

KONG Ran, HU Shuang-hui, WANG Shuai, WANG Yi-ru, CHEN Shu-ping. Discrete Afvén eigenmodes excited by energetic particles in JT-60U and JT-60SA[J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2013, 33(2): 113-120.

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