Analysis of cancellation exponents in two-dimensional Vlasov turbulence

Journal Article · Tue Jul 15 00:00:00 EDT 2014 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4891339· OSTI ID:22299821

De Vita, G.; Valentini, F.; Servidio, S.; Primavera, L.; Carbone, V.; Veltri, P. ^[1]; Sorriso-Valvo, L. ^[2]

---

1. Dipartimento di Fisica, Università della Calabria, 87036 Rende, CS (Italy)
2. CNR-IPCF - U.O.S. di Cosenza, 87036 Rende, CS (Italy)

Statistical properties of plasma turbulence are investigated by means of two-dimensional Vlasov simulations. In particular, a classical technique called signed measure is used to characterize the scaling behavior and the topology of sign-oscillating structures in simulations of the hybrid Vlasov-Maxwell model. Exploring different turbulence regimes, varying both the plasma β and the level of fluctuations, it is observed that Vlasov turbulence manifests two ranges with different exponents, the transition being observed near the ion skin depth. These results, which may have applications to both laboratory and astrophysical systems, further confirm the singular nature of small scale fluctuations in a plasma, mainly classified as intermittent, narrow, and intense current sheets.

• OSTI ID: 22299821
• Journal Information: Physics of Plasmas, Vol. 21, Issue 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ASTROPHYSICS
CURRENTS
FLUCTUATIONS
PLASMA
SIMULATION
TOPOLOGY
TURBULENCE
TWO-DIMENSIONAL CALCULATIONS