Sawtooth control experiments on ASDEX Upgrade
Sawtooth control experiments on ASDEX Upgrade
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DOI：
10.1088/0741-3335/47/10/004
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发表时间：
2005-09
影响因子：
2.2
通讯作者：
A. Mück;T. Goodman;M. Maraschek;G. Pereverzev;F. Ryter;H. Zohm
中科院分区：
文献类型：
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作者：
A. Mück;T. Goodman;M. Maraschek;G. Pereverzev;F. Ryter;H. Zohm
在融合装置中，所谓的锯齿不稳定性可能导致触发限制新古典撕裂模式的约束。另一方面，锯齿的存在对于去除聚变产物（即等离子体核心中的氦灰）是有利的。这引起了人们对锯齿控制的极大兴趣。通过局部修改 q 曲线可以极大地改变锯齿波周期。本文将介绍 ASDEX 升级托卡马克中中性束注入的束线几何形状的影响以及局域电子回旋加速器电流驱动的影响。电子回旋加速器电流沉积中从高场侧到低场侧的系统扫描可解析具有锯齿稳定和不稳定的区域。将讨论这些观察结果，包括主要结果的建模，并使用受实验数据约束的 ASTRA 传输代码。
In a fusion device, the so-called sawtooth instability can lead to the triggering of confinement limiting neoclassical tearing modes. On the other hand, the existence of sawteeth is desirable for the removal of one fusion product, i.e. helium ash from the plasma core. This has led to great interest in the control of sawteeth. The sawtooth period can be changed drastically by local modification of the q-profile. In this paper, the influence of the beam line geometry of the neutral beam injection in the ASDEX Upgrade tokamak will be presented as well as the effect of local electron cyclotron current drive. Systematic scans in the electron cyclotron current deposition from the high-field side to the low-field side resolve areas with sawtooth stabilization and destabilization. These observations will be discussed, including modelling of the main results, with the ASTRA transport code constrained by experimental data.