Measurement of the tilt angle of turbulent structures in magnetically confined plasmas using Doppler reflectometry

被引：14

作者：

Pinzon, J. R. ^{[1
,2
]}

Estrada, T. ^{[3
]}

Heppel, T. ^{[1
]}

Hennequin, P. ^{[4
]}

Blanco, E. ^{[3
]}

Stroth, U. ^{[1
,2
]}

机构：

[1] Max Plank Inst Plasmaphys, Garching, Germany

[2] TUM, Phys Dept E28, D-85748 Garching, Germany

[3] CIEMAT, Lab Nacl Fus, Madrid, Spain

[4] Ecole Polytech, Lab Phys Plasmas, Palaiseau, France

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2019年 / 61卷 / 10期

关键词：

plasma turbulence; plasma diagnostics; Doppler reflectometry; TRANSPORT; MODE;

D O I：

10.1088/1361-6587/ab394d

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The mean tilt angle of turbulent structures is a key element for describing the turbulence and its interplay with plasma flows in magnetically confined plasmas. It is a quantity predicted by theories and gyrokinetic simulations, which can provide information on the type of the dominant micro-instability, and also on the turbulence anisotropy induced by sheared flows. A new method for measuring the tilt angle of turbulent structures using Doppler reflectometry has been recently introduced (Pinzon et al 2019 Nucl. Fusion 59 074002). It is based on the time delay of the cross-correlation between microwaves backscattered at radially displaced positions. In this paper, the method is presented in detail and is successfully applied on the ASDEX Upgrade tokamak and the TJ-II stellarator. Measurements of the tilt angle in the core of both machines are reported, in the TJ-II case, for the first time.

引用

页数：17

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