This paper reports experimental results showing that coherent helical structures are formed in the reversed field pinch (RFP) self-organizing plasma core as a result of transitions to states where the n-spectrum of the m=1 modes is dominated by a single (1,n(max)) geometrical helicity. These states are dubbed quasi-single helicity (QSH) states. Their magnetic and thermal properties measured in the reverse field experiment (RFX) [G. Rostagni, Fusion Eng. Des. 25, 301 (1995)] device are described. The present theoretical understanding of QSH states is discussed and some recent theoretical results are presented. The role of aspect ratio is discussed. These results represent a significant step to open a path beyond the standard paradigm that a bath of magnetohydrodynamic (MHD) modes is intrinsic to the RFP.

Martin, P., Buffa, A., Cappello, S., D'Angelo, F., Escande, D., Franz, P., et al. (2000). Quasi-single helicity states in the reversed field pinch: Beyond the standard paradigm. PHYSICS OF PLASMAS, 7(5), 1984-1992 [10.1063/1.874054].

Quasi-single helicity states in the reversed field pinch: Beyond the standard paradigm

Martines E;
2000

Abstract

This paper reports experimental results showing that coherent helical structures are formed in the reversed field pinch (RFP) self-organizing plasma core as a result of transitions to states where the n-spectrum of the m=1 modes is dominated by a single (1,n(max)) geometrical helicity. These states are dubbed quasi-single helicity (QSH) states. Their magnetic and thermal properties measured in the reverse field experiment (RFX) [G. Rostagni, Fusion Eng. Des. 25, 301 (1995)] device are described. The present theoretical understanding of QSH states is discussed and some recent theoretical results are presented. The role of aspect ratio is discussed. These results represent a significant step to open a path beyond the standard paradigm that a bath of magnetohydrodynamic (MHD) modes is intrinsic to the RFP.
Articolo in rivista - Articolo scientifico
reversed field pinch; RFP; quasi-single helicity; QSH;
English
1984
1992
9
Martin, P., Buffa, A., Cappello, S., D'Angelo, F., Escande, D., Franz, P., et al. (2000). Quasi-single helicity states in the reversed field pinch: Beyond the standard paradigm. PHYSICS OF PLASMAS, 7(5), 1984-1992 [10.1063/1.874054].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/365819
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