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arXiv physics/0309114physics.plasm-ph
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存在共振撕裂模时RFP等离子体的平衡模型及其在粒子和热输运中的应用

An equilibrium model for RFP plasmas in the presence of resonant tearing modes with an application to particle and heat transport

P. Zanca, F. Sattin, E. Martines

摘要:

研究了存在饱和振幅撕裂模的有限β柱形RFP等离子体的平衡问题。通过对压力和平行电流密度分布的圆柱对称分量进行适当的正则化,并将其在模态有理表面的梯度设置为零,解决了由MHD力平衡方程JxB=grad(p)的微扰分析产生的奇异性。平衡模型,它满足正则化规则的各种合理的表面,开发。与反向场实验(RFX)的实验数据进行了比较,得到了令人鼓舞的结果。该模型提供了一个简单的工具来外推的磁性数据,通常只测量在等离子体的边缘,等离子体内部。作为应用,我们给出了由重建的磁场分布计算粒子和热的随机扩散系数。

英文摘要:

The equilibrium of a finite-beta cylindrical RFP plasma in the presence of saturated-amplitude tearing modes is investigated. The singularities arising from the perturbative analysis of the MHD force balance equation JxB=grad(p) are resolved through a proper regularization of the cylindrical symmetric component of the pressure and parallel current density profiles, by setting to zero their gradient at the modes rational surfaces. An equilibrium model, which satisfies the regularization rule at the various rational surfaces, is developed. The comparison with the experimental data from the Reversed Field eXperiment (RFX) gives encouraging results. The model provides an easy tool to extrapolate the magnetic data, ordinarily measured only at the plasma edge, inside the plasma. As an application, we present the computation of the particle and heat stochastic diffusion coefficient from the reconstructed magnetic field profile.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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