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Neoclassical MHD in ASDEX Upgrade and COMPASS-D

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Published under licence by IOP Publishing Ltd
, , Citation H Zohm et al 1997 Plasma Phys. Control. Fusion 39 B237 DOI 10.1088/0741-3335/39/12B/018

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Author affiliations

1 Institut für Plasmaforschung, Pfaffenwaldring 31, D-70569 Stuttgart, Germany

2 UKAEA, Fusion, Culham, Oxfordshire, OX14 3DB, UK, EURATOM-Association, UK

3 MPI für Plasmaphysik, Boltzmannstr. 2, D-85748 Garching, EURATOM-Association, Germany

Dates

  1. Received 13 June 1997

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0741-3335/39/12B/B237

Abstract

Neoclassical tearing modes are shown to be the MHD phenomenon that limits the achievable in long pulse discharges both in ASDEX Upgrade and in COMPASS-D. The experimental data are consistent with a generalized Rutherford equation including the effect of polarization currents induced by the motion of the island through the plasma. Possible strategies to avoid or reduce the effect of neoclassical tearing modes are discussed.

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10.1088/0741-3335/39/12B/018