Anomalous diffusion of energetic particles: connecting experiment and simulations
Anomalous diffusion of energetic particles: connecting experiment and simulations
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DOI：
10.1088/0029-5515/52/10/103018
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发表时间：
2012-09
期刊：
影响因子：
3.3
通讯作者：
M. Pueschel;F. Jenko;M. Schneller;T. Hauff;S. Günter;G. Tardini
中科院分区：
文献类型：
--
作者：
M. Pueschel;F. Jenko;M. Schneller;T. Hauff;S. Günter;G. Tardini
最近的实验和理论研究强调，需要定量预测在当今和未来的聚变装置中高能粒子的双折射引起的径向扩散。本文采用回旋动力学方法模拟了实际托卡马克平衡态中的被动快离子种，研究了粒子能量对静电和电磁湍流扩散的影响。为了便于更直接的理论和实验之间的比较，缩放关系推导出，允许写入相关的扩散系数作为实验上容易获得的数量的函数。在此背景下，描述了一种用于估计磁波动水平的改进方法。
Recent experimental and theoretical studies highlight the need to predict the turbulence-induced radial diffusion of energetic particles quantitatively in present-day and future fusion devices. Gyrokinetic simulations with passive fast ion species in realistic tokamak equilibria are used to investigate the influence of the particle energy on diffusion due to electrostatic and electromagnetic turbulence. To facilitate more straightforward comparisons between theory and experiments, scaling relations are derived that allow for writing the relevant diffusivities as functions of experimentally readily accessible quantities. In this context, an improved method for estimating the magnetic fluctuation level is described.