Electrostatic turbulence in the edge region of the RFX device has been shown to be intermittent, i.e. not self-similar. In fact the probability distribution function of fluctuations at large scales is Gaussian in shape, whereas it displays strong tails for small scale fluctuations. The events responsible for these heavy tails are associated with turbulent structures with well defined density and floating potential spatial profiles, which have been characterised using arrays of probes. These structures tend to occur preferentially in correspondence to large scale magnetic relaxation events driven by core-resonant tearing modes. They also display an inclination related to the average velocity shear.

Martines, E., Spolaore, M., Antoni, V., Regnoli, G., Vianello, N., Cavazzana, R., et al. (2001). E x B velocity shear and intermittent structures in RFX. CZECHOSLOVAK JOURNAL OF PHYSICS, 51(10), 983-993 [10.1023/A:1012881714423].

E x B velocity shear and intermittent structures in RFX

Martines E
Primo
;
2001

Abstract

Electrostatic turbulence in the edge region of the RFX device has been shown to be intermittent, i.e. not self-similar. In fact the probability distribution function of fluctuations at large scales is Gaussian in shape, whereas it displays strong tails for small scale fluctuations. The events responsible for these heavy tails are associated with turbulent structures with well defined density and floating potential spatial profiles, which have been characterised using arrays of probes. These structures tend to occur preferentially in correspondence to large scale magnetic relaxation events driven by core-resonant tearing modes. They also display an inclination related to the average velocity shear.
No
Articolo in rivista - Articolo scientifico
Scientifica
reversed field pinch; RFP; RFX; plasma turbulence; intermittency;
English
Martines, E., Spolaore, M., Antoni, V., Regnoli, G., Vianello, N., Cavazzana, R., et al. (2001). E x B velocity shear and intermittent structures in RFX. CZECHOSLOVAK JOURNAL OF PHYSICS, 51(10), 983-993 [10.1023/A:1012881714423].
Martines, E; Spolaore, M; Antoni, V; Regnoli, G; Vianello, N; Cavazzana, R; Serianni, G; Tramontin, L
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10281/365849
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