Nonlinear evolution of the internal kink mode in toroidal geometry for shaped tokamak plasmas
The nonlinear evolution of the internal kink mode is studied in toroidal geometry for noncircular cross section tokamak plasmas. The study is focused on very low shear and hollow q profiles with q(rho) greater than or equal to 1 for which the internal kink is unstable, in the latter case even at ..beta.. - 0. The nonlinear evolution is dominated by ideal magnetohydrodynamics (MHD), and the instability saturates, giving a quasi-helical shift to the magnetic axis. The nonlinear saturation is caused by increased field line bending. Time scales of 10/sup 3/ tau/sub Hp/ and axis shifts of 20% are reached when changes in q on the order of 3 x 10/sup -3/ from the marginal profile are produced. 25 refs., 27 figs.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 5611622
- Report Number(s):
- ORNL/TM-10585; ON: DE88003655
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
Similar Records
Magnetohydrodynamic stability and nonlinear evolution of the m = 1 mode in toroidal geometry for safety factor profiles with an inflection point
Tokamak m = 1 magnetohydrodynamic calculations in toroidal geometry using a full set of nonlinear resistive magnetohydrodynamic equations
Related Subjects
KINK INSTABILITY
NONLINEAR PROBLEMS
TOROIDAL CONFIGURATION
EQUILIBRIUM PLASMA
INSTABILITY GROWTH RATES
MAGNETIC FIELDS
MAGNETIC SURFACES
THEORETICAL DATA
TOKAMAK DEVICES
ANNULAR SPACE
CLOSED PLASMA DEVICES
CONFIGURATION
DATA
INFORMATION
INSTABILITY
MAGNETIC FIELD CONFIGURATIONS
NUMERICAL DATA
PLASMA
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
SPACE
THERMONUCLEAR DEVICES
700107* - Fusion Energy- Plasma Research- Instabilities