Ideal MHD stability limits of low aspect ratio tokamak plasmas
Ideal MHD stability limits of low aspect ratio tokamak plasmas
复制标题
低纵横比托卡马克等离子体的理想 MHD 稳定性极限
DOI：
10.1088/0029-5515/37/5/i03
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发表时间：
1997
期刊：
影响因子：
3.3
通讯作者：
J. Manickam
中科院分区：
文献类型：
--
作者：
J. Menard;S. Jardin;S. Kaye;C. Kessel;J. Manickam
本文数值计算了在圆柱安全因子q*、归一化等离子体压力β、伸长量kappa和中心安全因子q（0）范围内的低纵横比托卡马克等离子体的理想磁流体动力学（MHD）稳定极限。优化了四种不同的制度，即：（a）具有和不具有稳定壁的q（0）=1.1的低q * 等离子体，（B）没有壁且1.1<q（0）<2的低q * 等离子体，（c）需要壁和边缘电流驱动的中等kappa的高β、高自举分数等离子体，和（d）高β，具有中至高Kappa的非常高的自举分数等离子体需要稳定壁但几乎没有外部电流驱动。一个稳定的平衡被发现在一个纵横比为A=1.4和一个卡帕=3.0的伸长率，与99.3%的电流提供的等离子体压力和β = 45%。特别注意数值收敛性和自举电流分数的正确定义问题
The ideal magnetohydrodynamic (MHD) stability limits of low aspect ratio tokamak plasmas are computed numerically for plasmas with a range of cylindrical safety factors q*, normalized plasma pressures beta , elongations kappa and central safety factors q(0). Four distinct regimes are optimized, namely: (a) low-q* plasmas with q(0)=1.1 with and without a stabilizing wall, (b) low-q* plasmas with no wall and 1.1<q(0)<2, (c) high- beta , high bootstrap fraction plasmas at moderate kappa requiring a wall and edge current drive and (d) high- beta , very high bootstrap fraction plasmas with moderate to high kappa requiring a stabilizing wall but little external current drive. A stable equilibrium is found at an aspect ratio of A=1.4 and an elongation of kappa =3.0, with 99.3% of the current provided by the plasma pressure and beta =45%. Special attention is paid to the issues of numerical convergence and the proper definition of bootstrap current fraction
影响因子：
3.3
作者：
A. Gibson;T. Sekiguchi;K. Lackner;S. Bodner;R. Hancox
通讯作者：
A. Gibson;T. Sekiguchi;K. Lackner;S. Bodner;R. Hancox