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Electron transport in the stochastic fields of the reversed-field pinch

Published online by Cambridge University Press:  13 March 2009

Myung-Hee Kim  and
Alkesh Punjabi
Myung-Hee Kim
Affiliation:
Center for Fusion Research and Training, Hampton University, Hampton, Virginia 23668, U.S.A.
Alkesh Punjabi
Affiliation:
Center for Fusion Research and Training, Hampton University, Hampton, Virginia 23668, U.S.A.
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Abstract

We employ the Monte Carlo method for the calculation of anomalous transport developed by Punjabi and Boozer to calculate the particle diffusion coefficient for electrons in the stochastic magnetic fields of the reversed-field pinch (RFP). in the Monte Carlo calculations represented here, the transport mechanism is the loss of magnetic surfaces due to resistive perturbations. The equilibrium magnetic fields are represented by the Bessel function model for the RFP. The diffusion coefficient D is calculated as a function of a, the amplitude of the perturbation. We see three regimes as the amplitude of the tearing modes is increased: the Rechester—Rosenbluth regime where D scales as a2 the anomalous regime where D scales more rapidly than a2 and the Mynick—Krornmes regime where D scales more slowly than a2. Inclusion of the effects of loop voltage on the particle drift orbits in the RFP does not affect the intervals in the amplitude a where these regimes operate.

Type
Research Article
Information
Journal of Plasma Physics , Volume 56 , Issue 1 , August 1996 , pp. 3 - 12
Copyright
Copyright © Cambridge University Press 1996

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References

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