By employing Hybrid Vlasov-Maxwell simulations in 2D-3V phase space configuration (2D in physical space and 3D in velocity space) of plasma turbulence, the statistical properties of the energy cascade at kinetic scales have been investigated. High-order moments of the magnetic field fluctuations have been inspected in order to quantify the intermittency phenomenon. At scales l larger than the ion skin depth d(i), fluctuations exhibit anomalous scaling, suggesting the presence of a multifractal intermittent turbulent cascade. For l < d(i), fluctuations show monoscaling, indicating Gaussian statistics. This scenario is consistent with the statistics of the dissipation fields J . E and J(2), suggesting that the processes of dissipation, intended as a conversion of energy from electromagnetic fluctuations to electron Ohmic heating and non-thermal proton effects, occur non-homogeneously in space.
Multifractal scaling and intermittency in hybrid Vlasov-Maxwell simulations of plasma turbulence / Leonardis, E; SORRISO VALVO, Luca; Valentini, Francesco; Servidio, Sergio; Carbone, V; Veltri, Pierluigi. - In: PHYSICS OF PLASMAS. - ISSN 1070-664X. - 23:2(2016), pp. 022307.022307-1-022307.022307-7.
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Titolo: | Multifractal scaling and intermittency in hybrid Vlasov-Maxwell simulations of plasma turbulence |
Autori: | |
Data di pubblicazione: | 2016 |
Rivista: | |
Citazione: | Multifractal scaling and intermittency in hybrid Vlasov-Maxwell simulations of plasma turbulence / Leonardis, E; SORRISO VALVO, Luca; Valentini, Francesco; Servidio, Sergio; Carbone, V; Veltri, Pierluigi. - In: PHYSICS OF PLASMAS. - ISSN 1070-664X. - 23:2(2016), pp. 022307.022307-1-022307.022307-7. |
Handle: | http://hdl.handle.net/20.500.11770/144478 |
Appare nelle tipologie: | 1.1 Articolo in rivista |