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Modelling of magnetic perturbations and confinement in SSPX spheromak
- Source :
- Plasma Physics and Controlled Fusion. 48:235-244
- Publication Year :
- 2006
- Publisher :
- IOP Publishing, 2006.
-
Abstract
- The effects of magnetic perturbation on the quality of confinement in the sustained spheromak plasma experiment (SSPX) (Hooper E B et al 1999 Nucl. Fusion 39 863) are studied. The magnetic field is taken as a sum of an unperturbed axisymmetric magnetic field, B 0 , calculated from a magneto-hydrodynamic equilibrium, and a non-axisymmetric part, δB, representing the effects of kinking perturbation of the central plasma column. Poincare maps show that flux surfaces are strongly affected by perturbations with δB/B 0 ? 5%, with islands and stochastic regions covering a substantial part of plasma volume. The effective heat transport in the perturbed magnetic field, calculated by a Monte-Carlo procedure, is found to be consistent with the experimentally measured level of confinement.
Details
- ISSN :
- 13616587 and 07413335
- Volume :
- 48
- Database :
- OpenAIRE
- Journal :
- Plasma Physics and Controlled Fusion
- Accession number :
- edsair.doi...........6c045ba28096516b20fe4a01435a1336