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Article Dans Une Revue Plasma Physics and Controlled Fusion Année : 2019

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

Javier Pinzon
  • Fonction : Auteur
Teresa Estrada
  • Fonction : Auteur
T. Happel
  • Fonction : Auteur
Pascale Hennequin
E. Blanco
  • Fonction : Auteur
Ulrich Stroth
  • Fonction : Auteur

Résumé

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 [J R Pinzón 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.

Dates et versions

hal-02271431 , version 1 (26-08-2019)

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Citer

Javier Pinzon, Teresa Estrada, T. Happel, Pascale Hennequin, E. Blanco, et al.. Measurement of the tilt angle of turbulent structures in magnetically confined plasmas using Doppler reflectometry. Plasma Physics and Controlled Fusion, 2019, ⟨10.1088/1361-6587/ab394d⟩. ⟨hal-02271431⟩
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