Critically Balanced Ion Temperature Gradient Turbulence in Fusion Plasmas

被引：95

作者：

Barnes, M. ^{[1
,2
]}

Parra, F. I. ^{[1
]}

Schekochihin, A. A. ^{[1
]}

机构：

[1] Univ Oxford, Rudolf Peierls Ctr Theoret Phys, Oxford OX1 3NP, England

[2] Euratom CCFE Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 11期

基金：

英国工程与自然科学研究理事会;

关键词：

DRIVEN TURBULENCE; SAFETY FACTOR; TRANSPORT; SIMULATIONS; TOKAMAK;

D O I：

10.1103/PhysRevLett.107.115003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Scaling laws for ion temperature gradient driven turbulence in magnetized toroidal plasmas are derived and compared with direct numerical simulations. Predicted dependences of turbulence fluctuation amplitudes, spatial scales, and resulting heat fluxes on temperature gradient and magnetic field line pitch are found to agree with numerical results in both the driving and inertial ranges. Evidence is provided to support the critical balance conjecture that parallel streaming and nonlinear perpendicular decorrelation times are comparable at all spatial scales, leading to a scaling relationship between parallel and perpendicular spatial scales. This indicates that even strongly magnetized plasma turbulence is intrinsically three dimensional.

引用

页数：5

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