Tearing modes in tokamaks with lower hybrid current drive

Technical Report · Wed Aug 01 04:00:00 EDT 1990

OSTI ID:6656953

Xu, X Q ^[1]; Rosenbluth, M N ^[2]

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1. Texas Univ., Austin, TX (USA). Inst. for Fusion Studies
2. California Univ., San Diego, La Jolla, CA (USA). Dept. of Physics General Atomics Co., San Diego, CA (USA)

In this paper, the effect of current drive on the tearing modes in the semi-collisional regime is analyzed using the drift-kinetic equation. A collisional operator is developed to model electron parallel conductivity. For the pure tearing modes the linear and quasilinear growth rates in the Rutherford regimes have been found to have roughly the same forms with a modified resistivity as without current drive. One interesting result is the prediction of a new instability. This instability, driven by the current gradient inside the tearing mode layer, is possibly related to MHD behavior observed in these experiments. 9 refs.

• Research Organization: Texas Univ., Austin, TX (USA). Inst. for Fusion Studies
• Sponsoring Organization: DOE/ER
• DOE Contract Number: FG05-80ET53088
• OSTI ID: 6656953
• Report Number(s): DOE/ET/53088-444; IFSR--444; ON: DE90017090
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107* -- Fusion Energy-- Plasma Research-- Instabilities
CLOSED PLASMA DEVICES
DISTRIBUTION FUNCTIONS
EQUATIONS
EQUILIBRIUM
FUNCTIONS
INSTABILITY
KINETIC EQUATIONS
LOWER HYBRID CURRENT DRIVE
MHD EQUILIBRIUM
NON-INDUCTIVE CURRENT DRIVE
NONLINEAR PROBLEMS
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
TEARING INSTABILITY
THERMONUCLEAR DEVICES
TOKAMAK DEVICES