Comparison of m = 2, n = 1 neo-classical tearing mode limits in JET and DIII-D
Comparison of m = 2, n = 1 neo-classical tearing mode limits in JET and DIII-D
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DOI：
10.1088/0029-5515/44/7/010
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发表时间：
2004-06
期刊：
影响因子：
3.3
通讯作者：
T. Hender;D. Howell;R. Buttery;O. Sauter;F. Sartori;R. L. Haye;A. Hyatt;C. Petty;J. Contributors;the DIII-D team
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文献类型：
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作者：
T. Hender;D. Howell;R. Buttery;O. Sauter;F. Sartori;R. L. Haye;A. Hyatt;C. Petty;J. Contributors;the DIII-D team
在JET和DIII-D上进行了联合实验，研究了m = 2, n = 1的新古典撕裂模式（ntm）。在两台机器上观察到非常相似的不稳定行为，模态岛宽度随β的缩放和在q = 2处观察到n = 1个岛，强烈指出这些模态是由新古典效应驱动的。在JET和DIII-D上使用紧密匹配的无量纲参数（等离子体形状、宽高比、q、ρ*和碰撞）进行的同一性实验显示，NTM具有相似的全局β-极限。进一步的缩放，结合来自JET和DIII-D的更广泛的数据集，显示出离子回旋半径的近似线性缩放，或者略强，对碰撞的依赖性相对较弱。
Joint experiments have been conducted on JET and DIII-D to study m = 2, n = 1 neo-classical tearing modes (NTMs). Very similar instability behaviour is observed on both machines and the scaling of the mode island width with β and the observation of n = 1 islands at q = 2, strongly points to these modes being driven by neo-classical effects. Identity experiments using closely matched non-dimensional parameters (plasma shape, aspect ratio, q, ρ* and collisionality) on JET and DIII-D show similar global β-limits for the NTM. Further scalings, which combine broader data sets from JET and DIII-D, show an approximately linear scaling, or slightly stronger, with ion gyro-radius and a relatively weak dependence on collisionality.