Published August 28, 2009
| Version v1
Journal article
Characterizations of Low-Frequency Zonal Flow in the Edge Plasma of the HL-2A Tokamak
Creators
- 1. CAS Key Laboratory of Basic Plasma Physics, and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China)
- 2. Southwestern Institute of Physics, P.O. Box 432, Chengdu, Sichuan 610041 (China)
Description
A low-frequency (<4 kHz), poloidally and toroidally symmetrical potential structure that peaks near zero frequency is observed in the edge plasma of the HL-2A tokamak. The axisymmetry structure exhibits a radial coherence length less than 1 cm. These characteristics are consistent with the theoretically predicted low-frequency zonal flows (LFZF). The radial wave-number frequency spectra of the LFZF show that the LFZF packets propagate both outwards and inwards. The geodesic acoustic mode (GAM) is found to coexist with the LFZF, and the LFZF is found to modulate the GAM and ambient turbulence with in-phase and antiphase relations, respectively, through an envelope analysis.
Additional details
Identifiers
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 103
- Journal Issue
- 9
- Journal Page Range
- p. 095002-095002.4
- ISSN
- 0031-9007
- CODEN
- PRLTAO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 41083753
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Descriptors DEI
- COHERENCE LENGTH; HL-2A TOKAMAK; PLASMA; POTENTIALS; SPECTRA; TURBULENCE
- Descriptors DEC
- CLOSED PLASMA DEVICES; DIMENSIONS; LENGTH; THERMONUCLEAR DEVICES; TOKAMAK DEVICES
Optional Information
- Notes
- (c) 2009 The American Physical Society