title: Measurements of the MHD dynamo in the quasi-single-helicity reversed-field pinch.
abstract: The first experimental study of the MHD dynamo in a quasi-single-helicity (QSH) reversed-field pinch toroidal plasma is presented. In QSH plasmas, a dominant wave number appears in the velocity fluctuation spectrum. This velocity component extends throughout the plasma volume and couples with magnetic fluctuations to produce a significant MHD dynamo electric field. The narrowing of the velocity fluctuation spectrum and the single-mode character of the dynamo are features predicted by theory and computation, but only now are observed in experiment.
authors.affiliation: Consorzio RFX, Associazione EURATOM-ENEA sulla Fusione, Corso Stati Uniti 4, 35127 Padua, Italy.
authors.forename: P
authors.initials: P
authors.lastname: Piovesan
authors.forename: D
authors.initials: D
authors.lastname: Craig
authors.forename: L
authors.initials: L
authors.lastname: Marrelli
authors.forename: S
authors.initials: S
authors.lastname: Cappello
authors.forename: P
authors.initials: P
authors.lastname: Martin