Published November 1, 2018 | Version v1
Journal article Metadata-only

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

Creators

  • 1. Peter the Great St. Petersburg Polytechnic University, St. Petersburg (Russian Federation)
  • 2. Ioffe Institute, St. Petersburg (Russian Federation)

Description

The results of limit cycle oscillation (LCO) studies in the spherical Globus-M tokamak are presented. The oscillations of E  ×  B drift velocity, turbulence level, Dα 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. (paper)

Availability note (English)

Available from http://dx.doi.org/10.1088/1741-4326/aac4d8

Additional details

Identifiers

DOI
10.1088/1741-4326/aac4d8;

Publishing Information

Journal Title
Nuclear Fusion
Journal Volume
58
Journal Issue
11
Journal Page Range
[8 p.]
ISSN
0029-5515
CODEN
NUFUAU

INIS

Country of Publication
International Atomic Energy Agency (IAEA)
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
51093523
Subject category
S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
Descriptors DEI
CUPRATES; H-MODE PLASMA CONFINEMENT; LANTHANUM COMPOUNDS; LIMIT CYCLE; MAGNETIC FIELDS; OSCILLATIONS; PLASMA DENSITY; SPHERICAL CONFIGURATION; TOKAMAK DEVICES; VISIBLE RADIATION
Descriptors DEC
ATTRACTORS; CLOSED PLASMA DEVICES; CONFIGURATION; CONFINEMENT; COPPER COMPOUNDS; ELECTROMAGNETIC RADIATION; MAGNETIC CONFINEMENT; OXYGEN COMPOUNDS; PLASMA CONFINEMENT; RADIATIONS; RARE EARTH COMPOUNDS; THERMONUCLEAR DEVICES; TRANSITION ELEMENT COMPOUNDS