HR: 1340h
AN: SM53B-1282    [Abstracts]
TI: Position and velocity space diffusion of test particles in stochastic electromagnetic fields
AU: Perri, S
EM: sperri@fis.unical.it
AF: Dipartimento di Fisica Universita` della Calabria, Ponte P. Bucci 31/C, Rende (CS), I-87036, Italy
AU: Lepreti, F
EM: lepreti@fis.unical.it
AF: Dipartimento di Fisica Universita` della Calabria, Ponte P. Bucci 31/C, Rende (CS), I-87036, Italy
AU: Lepreti, F
EM: lepreti@fis.unical.it
AF: CNISM, Unita` di Cosenza, Ponte P. Bucci 31/C, Rende (CS), I-87036, Italy
AU: * Carbone, V
EM: carbone@fis.unical.it
AF: Dipartimento di Fisica Universita` della Calabria, Ponte P. Bucci 31/C, Rende (CS), I-87036, Italy
AU: Vulpiani, A
EM: Angelo.Vulpiani@roma1.infn.it
AF: Dipartimento di Fisica and INFN Universita` di Roma "La Sapienza", Piazzale A. Moro 2, Roma, I-00185, Italy
AB: The two-dimensional diffusive dynamics of test particles in a random electromagnetic field is studied. The synthetic electromagnetic fluctuations are generated through randomly placed magnetised "clouds" oscillating with a frequency ω. We investigate the mean square displacements of particles in both position and velocity spaces. As ω increases the particles undergo standard (Brownian-like) motion, anomalous diffusion and ballistic motion in position space. Although in general the diffusion properties in velocity space are not trivially related to those in position space, we find that energization is present only when particles display anomalous diffusion in position space. The anomalous character of the diffusion is only in the non-standard values of the scaling exponents while the process is Gaussian.
DE: 2114 Energetic particles (7514)
DE: 7514 Energetic particles (2114)
DE: 7807 Charged particle motion and acceleration
DE: 7845 Particle acceleration
SC: SPA-Magnetospheric Physics [SM]
MN: 2007 Fall Meeting