Electronic Resource
New York, NY
:
American Institute of Physics (AIP)
Physics of Fluids
4 (1992), S. 159-170
ISSN:
1089-7666
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Numerical simulations of the evolution of large-scale magnetic fields have been developed using a mean-field Ohm's law. The Ohm's law is coupled to a Δ' stabilty analysis and a magnetic island growth equation in order to simulate the behavior of tokamak plasmas that are subject to tearing modes. In one set of calculations, the magnetohydrodynamic (MHD)-stable regime of the tokamak is examined via the construction of an li -qa diagram. The results confirm previous calculations that show that tearing modes introduce a stability boundary into the li -qa space. In another series of simulations, the interaction between tearing modes and the bootstrap current is investigated. The results indicate that a completely bootstrapped tokamak may be possible, even in the absence of any externally applied loop voltage or current drive.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.860429
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