Particle transport in tokamak plasmas, theory and experiment
Particle transport in tokamak plasmas, theory and experiment
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DOI：
10.1088/0741-3335/51/12/124017
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发表时间：
2009-11
影响因子：
2.2
通讯作者：
C. Angioni;E. Fable;M. Greenwald;M. Maslov;A. Peeters;H. Takenaga;H. Weisen
中科院分区：
文献类型：
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作者：
C. Angioni;E. Fable;M. Greenwald;M. Maslov;A. Peeters;H. Takenaga;H. Weisen
描述了在托卡马克等离子体核心中产生电子粒子输运的物理过程。从回旋动力学方程出发，一个简单的解析推导被用作指导，以阐明驱动湍流粒子对流的主要机制。对托卡马克中粒子输运的实验观测进行了综述，并讨论了与理论预测的一致性。在复杂的理论预测和同样复杂的实验观测之间出现了总体上的定性一致，在某些情况下甚至是特定的定量一致，在不同的运行模式下对等离子体参数表现出不同的依赖性。通过这些结果，指出了宏观输运性质与微观湍流特性之间的直接联系，并获得了对微不稳定性和湍流作为托卡马克核心输运的主要原因这一范式的重要确认。最后，说明了这些结果对预测聚变反应堆中电子密度分布峰值的影响。
The physical processes producing electron particle transport in the core of tokamak plasmas are described. Starting from the gyrokinetic equation, a simple analytical derivation is used as guidance to illustrate the main mechanisms driving turbulent particle convection. A review of the experimental observations on particle transport in tokamaks is presented and the consistency with the theoretical predictions is discussed. An overall qualitative agreement, and in some cases even a specific quantitative agreement, emerges between complex theoretical predictions and equally complex experimental observations, exhibiting different dependences on plasma parameters under different regimes. By these results, the direct connection between macroscopic transport properties and the character of microscopic turbulence is pointed out, and an important confirmation of the paradigm of microinstabilities and turbulence as the main cause of transport in the core of tokamaks is obtained. Finally, the impact of these results on the prediction of the peaking of the electron density profile in a fusion reactor is illustrated.