Phenomena of limit-cycle oscillations in the Globus-M spherical tokamak

被引：24
|
作者：
Yashin, A. Yu. [1 ]
Bulanin, V. V. [1 ]
Gusev, V. K. [2 ]
Kurskiev, G. S. [2 ]
Patrov, M. I. [2 ]
Petrov, A. V. [1 ]
Petrov, Yu. V. [2 ]
Tolstyakov, S. Yu. [2 ]
机构：
[1] Peter Great St Petersburg Polytech Univ, St Petersburg, Russia
[2] Ioffe Inst, St Petersburg, Russia
来源：
NUCLEAR FUSION | 2018年 / 58卷 / 11期
基金：
俄罗斯科学基金会;
关键词：
limit-cycle oscillations; turbulence; L-H transition; Doppler backscattering;
D O I：
10.1088/1741-4326/aac4d8
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 results of limit cycle oscillation (LCO) studies in the spherical Globus-M tokamak are presented. The oscillations of E x B drift velocity, turbulence level, Da light emission, plasma density and magnetic field with the LCO frequency were simultaneously observed. Properties of two LCO regimes, with and without the transition to the H-mode, are compared. The results of a correlation analysis between the flows and turbulence require the use of a 1D model of the LCO development. The bicoherent analysis demonstrates that zonal flows dominate in LCOs. An up-down asymmetry of the poloidal magnetic field oscillations with the LCO frequency is found.
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页数：8
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