Numerical simulation of the plasma current quench following a disruptive energy loss
The plasma electromagnetic interaction with poloidal field coils and nearby passive conductor loops during the current quench following a disruptive loss of plasma energy is simulated. By solving a differential/algebraic system consisting of a set of circuit equations (including the plasma circuit) coupled to a plasma energy balance equation and an equilibrium condition, the electromagnetic consequences of an abrupt thermal quench are observed. Limiters on the small and large major radium sides of the plasma are assumed to define the plasma cross section. The presence of good conductors near the plasma and a small initial distance (i.e., 5 to 10% of the plasma minor radius) between the plasma edge and an inboard limiter are shown to lead to long current decay times. For a plasma with an initial major radius R/sub o/ = 4.3 m, aspect ratio A = 3.6, and current I/sub P/ = 4.0 MA, introducing nearby passive conductors lengthens the current decay from milliseconds to hundreds of milliseconds.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5592051
- Report Number(s):
- ORNL/FEDC-83/2; ON: DE84003151
- Country of Publication:
- United States
- Language:
- English
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Numerical simulation of the plasma current quench following a disruptive energy loss
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PLASMA DISRUPTION
MATHEMATICAL MODELS
QUENCHING
DIFFERENTIAL EQUATIONS
ENERGY BALANCE
MAGNET COILS
NUMERICAL SOLUTION
TOROIDAL CONFIGURATION
ANNULAR SPACE
CONFIGURATION
ELECTRIC COILS
ELECTRICAL EQUIPMENT
EQUATIONS
EQUIPMENT
SPACE
700107* - Fusion Energy- Plasma Research- Instabilities