Enhanced confinement and quasi-single-helicity regimes induced by poloidal current drive

D. Terranova, A. Alfier, F. Bonomo, P. Franz, P. Innocente, R. Pasqualotto

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Abstract

Enhanced confinement regimes with quasihelical symmetry are reproducibly obtained in the modified reversed field pinch eXperiment (RFX)-mod by reducing the level of internal chaos through the combination of a smooth magnetic boundary (through a virtual shell scheme) and the oscillating poloidal current drive technique. The plasma moves from a chaotic multiple helicity towards a quasi-single-helicity regime with a magnetic island showing high temperature and soft x-ray emissivity. The chaos reduction involves also the plasma outside the island allowing for a global enhanced confinement with an improvement up to 50%. © 2007 The American Physical Society.
Original languageEnglish
Article number095001
Pages (from-to)-
JournalPhysical Review Letters
Volume99
Issue number9
DOIs
Publication statusPublished - 29 Aug 2007
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Terranova, D., Alfier, A., Bonomo, F., Franz, P., Innocente, P., & Pasqualotto, R. (2007). Enhanced confinement and quasi-single-helicity regimes induced by poloidal current drive. Physical Review Letters, 99(9), -. [095001]. https://doi.org/10.1103/PhysRevLett.99.095001