Scaling of the critical plasma rotation for stabilization of the n = 1 resistive wall mode (ideal kink) in the DIII-D tokamak
Scaling of the critical plasma rotation for stabilization of the n = 1 resistive wall mode (ideal kink) in the DIII-D tokamak
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DOI：
10.1088/0029-5515/44/11/005
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发表时间：
2004-11
期刊：
影响因子：
3.3
通讯作者：
R. L. Haye;A. Bondeson;M. Chu;A. Garofalo;Y.Q Liu;G. Navratil;M. Okabayashi;H. Reimerdes
中科院分区：
文献类型：
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作者：
R. L. Haye;A. Bondeson;M. Chu;A. Garofalo;Y.Q Liu;G. Navratil;M. Okabayashi;H. Reimerdes
在DIII-D托卡马克上的实验表明，如果等离子体旋转足够快，n = 1的理想扭结可以通过电阻壁来稳定。对于β介于理论预测的无壁和理想壁稳定极限之间的等离子体，建立了一个关于n = 1电阻壁模式的开始与平衡环向磁场、等离子体密度和环向旋转的函数的数据库。我们发现，临界旋转频率与alfvsamn时间成反比，其中ω φ τA≈0.02（在ρ≈0.6的q = 2表面上计算）或ω φ τS≈0.7，其中τS是声音时间。ω φ τ A或ω φ τ s对βN/βN的依赖性，1-2处没有弱壁，表明等离子体处于“中间耗散”状态。
Experiments in the DIII-D tokamak show that the n = 1 ideal kink can be stabilized by a resistive wall if the plasma is rotating fast enough. A database of the onset of the n = 1 resistive wall mode as a function of the equilibrium toroidal magnetic field, the plasma density and the toroidal rotation has been assembled for plasmas with beta between the theoretically predicted no wall and ideal wall stability limits. The critical rotation frequency is found to scale as the inverse of the Alfvén time with ω ϕ τA ≈ 0.02 (evaluated at the q = 2 surface at ρ ≈ 0.6) or ωϕ τS ≈ 0.7, where τS is the sound time. The dependence of ωϕ τ A or ωϕ τS on βN/βN,no wall from 1–2 is weak and suggests the plasmas are in the ‘intermediate dissipation’ regime.