Phys. Rev. Lett. 70, 2086–2089 (1993)H mode of the W 7-AS stellaratorReceived 17 November 1992; published in the issue dated 5 April 1993 In W 7-AS the H mode has been observed for the first time in a currentless stellarator plasma. H modes are achieved with 0.4 MW electron cyclotron resonance heating at 140 GHz at high density. The H phases display all characteristics known from tokamak H modes including edge localized modes (ELMs). The achievement of the H mode in a shear-free stellarator without toroidal current has consequences on H-mode transition and ELM theories. © 1993 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.70.2086
DOI:
10.1103/PhysRevLett.70.2086
PACS:
52.55.Hc, 52.50.Gj
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