scholarly journals Penetration and radial force balance in field-reversed configuration with large rotating magnetic field

2008 ◽  
Vol 15 (10) ◽  
pp. 104504 ◽  
Author(s):  
M. Ohnishi ◽  
W. Hugrass ◽  
M. Fukuhara ◽  
T. Masaki ◽  
H. Osawa ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Radial Force ◽  
Rotating Magnetic Field ◽  
Force Balance ◽  
Field Reversed Configuration

Measurements of the oscillating fields and the time-averaged forces in rotating magnetic field current drive

1988 ◽  
Vol 40 (1) ◽  
pp. 127-142 ◽  
Author(s):  
G. A. Collins ◽  
G. Durance ◽  
J. Tendys
Keyword(s):  
Magnetic Field ◽  
Equatorial Plane ◽  
Wave Mode ◽  
Plasma Pressure ◽  
Radial Force ◽  
Current Drive ◽  
Rotating Magnetic Field ◽  
Fast Wave ◽  
Field Reversed Configuration ◽  
Frequency Magnetic Field

Measurement of the RF (radio-frequency) magnetic field about the equatorial plane of the rotamak has enabled the distribution of the oscillating currents to be derived. The time-averaged forces, produced by the interaction of these currents with the oscillating field, have been estimated. In the standard field-reversed configuration there is a radial force, which helps to confine the plasma pressure, and a toroidal force, which drives the equilibrium current. In compact tokamak configurations there is an additional poloidal force, which produces a diamagnetic current. As the toroidal field increases, penetration of the RF fields improves owing to the excitation of a whistler wave mode. The connection between the rotating magnetic field technique and fast wave current drive is explained.

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