Published September 12, 2008
| Version v1
Journal article
Geodesic Acoustic Mode Induced by Toroidal Rotation in Tokamaks
Creators
- 1. Department of Physics and Astronomy, EURATOM/VR Fusion Association, P.O. Box 516, Uppsala University, SE-751 20 Uppsala (Sweden)
Description
The effect of toroidal rotation on the geodesic acoustic mode (GAM) in a tokamak is studied. It is shown that, in addition to a small frequency upshift of the ordinary GAM, another GAM, with much lower frequency, is induced by the rotation. The new GAM appears as a consequence of the nonuniform plasma density and pressure created by the centrifugal force on the magnetic surfaces. Both GAMs in a rotating plasma are shown to exist both as continuum modes with finite mode numbers m and n at the rational surfaces q=m/n as well as in the form of axisymmetric modes with m=n=0
Additional details
Identifiers
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 101
- Journal Issue
- 11
- Journal Page Range
- p. 115003-115003.4
- ISSN
- 0031-9007
- CODEN
- PRLTAO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 40053911
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Descriptors DEI
- AXIAL SYMMETRY; MODE RATIONAL SURFACES; PLASMA DENSITY; ROTATING PLASMA; ROTATION; TOKAMAK DEVICES
- Descriptors DEC
- CLOSED PLASMA DEVICES; MAGNETIC FIELD CONFIGURATIONS; MAGNETIC SURFACES; MOTION; PLASMA; SYMMETRY; THERMONUCLEAR DEVICES
Optional Information
- Notes
- (c) 2008 The American Physical Society