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An analytic solution for the force-free magnetic field, ∇×B=λB, in the poloidal divertor configuration of the Tokapole II device [Nucl. Fusion 19, 1509 (1979)] is presented. Experiments conducted on Tokapole II which provide equilibrium magnetic field profile measurements using a magnetic probe are then described. Observations include a non-constant-λ profile and a large diamagnetic current near the magnetic separatrix.
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Sarff et al. (1987) studied this question.
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