Müller S H, Fasoli A, Labit B, McGrath M, Podestà M, Poli F M
Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.
Phys Rev Lett. 2004 Oct 15;93(16):165003. doi: 10.1103/PhysRevLett.93.165003. Epub 2004 Oct 14.
The particle confinement in a magnetized plasma torus with superimposed vertical magnetic field is modeled and measured experimentally. The formation of an equilibrium characterized by a parallel plasma current canceling out the grad B and curvature drifts is described using a two-fluid model. Characteristic response frequencies and relaxation rates are calculated. The predictions for the particle confinement time as a function of the vertical magnetic field are verified in a systematic experimental study on the TORPEX device, including the existence of an optimal vertical field and the anticorrelation between confinement time and density.
对具有叠加垂直磁场的磁化等离子体环面中的粒子约束进行了建模，并通过实验进行了测量。使用双流体模型描述了以平行等离子体电流抵消梯度B漂移和曲率漂移为特征的平衡态的形成。计算了特征响应频率和弛豫率。在TORPEX装置上进行的系统实验研究中验证了粒子约束时间作为垂直磁场函数的预测，包括最佳垂直场的存在以及约束时间与密度之间的反相关性。
