Tearing modes in tokamaks with lower hybrid current drive

Journal Article · Fri Feb 01 04:00:00 EST 1991 · Physics of Fluids B; (USA)

DOI:https://doi.org/10.1063/1.859746· OSTI ID:6145874

Xu, X Q ^[1]; Rosenbluth, M N ^[2]

---

1. Institute for Fusion Studies, The University of Texas at Austin, Austin, TX (USA)
2. Department of Physics, B-019, University of California, San Diego, La Jolla, CA (USA) General Atomics, San Diego, CA (USA)

In this paper, the effect of current drive on the tearing modes in the semicollisional 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 magnetohydrodynamic (MHD) behavior observed in these experiments.

• OSTI ID: 6145874
• Journal Information: Physics of Fluids B; (USA), Journal Name: Physics of Fluids B; (USA) Vol. 3:2; ISSN 0899-8221; ISSN PFBPE
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101 -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
700107 -- Fusion Energy-- Plasma Research-- Instabilities
700108* -- Fusion Energy-- Plasma Research-- Wave Phenomena
CLOSED PLASMA DEVICES
COLLISIONAL PLASMA
CURRENT-DRIVE HEATING
ELECTRIC HEATING
ELECTRON DRIFT
EQUATIONS
HEATING
HIGH-FREQUENCY HEATING
INSTABILITY
INSTABILITY GROWTH RATES
JOULE HEATING
KINETIC EQUATIONS
LOWER HYBRID HEATING
PLASMA
PLASMA HEATING
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
RESISTANCE HEATING
TEARING INSTABILITY
THERMONUCLEAR DEVICES
TOKAMAK DEVICES