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This paper investigates the influence of toroidal effects (due to the coupling of various poloidal harmonics) on the non-linear saturation of the m=1 island. Bounds are obtained relating the aspect ratio, the shear at the q=1 surface and the saturated island width. Provided these bounds are satisfied, the cylindrical m=1 island theory of A Thyagaraja and F A Haas (to appear in Physics of Fluids B) is valid for toroidal geometry.

Additional information

Authors: AVINASH K, Institute for Plasma Research, Bhat, Gandhinager (IN);HAAS F A, UKAEA, Culham Laboratory, Abingdon, Oxon. (GB);THYAGARAJA A, UKAEA, Culham Laboratory, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: AEA FUS 77 EN (1990) 7 pp.
Availability: Available from the Librarian, UKAEA, Culham Laboratory, Abingdon, Oxon. OX14 3DB (GB)
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