Seminar by Oreste Pezzi
Zoom - November 23, 2023 - 15.00
WEBINAR LINK
Title: The role of large-scale plasma turbulence in influencing particle transport and energization in
astrophysical contexts.
Abstract: Populations of energetic
particles, ranging from solar
energetic particles to incredibly
high-energy cosmic rays, are
ubiquitous in space and
astrophysical plasmas. Several
intertwined phenomena, including
shocks, magnetic reconnection, and
turbulence, are responsible for
the efficient acceleration of
particles and for determining
their transport properties for
efficient particle energization.
Plasma turbulence produces patchy
coherent structures, such as
reconnecting current sheets,
plasmoids, and vortices across a
vast range of spatial scales.
Under some circumstances, these
structures can entrap particles,
thus providing fast energization
through, for example, drift
acceleration. In this talk, I will
review some of these mechanisms
and outline recent numerical
efforts aimed at investigating how
the large-scale complexity of the
turbulent magnetic field
influences particle transport and
how large-scale coherent
structures impact particle
energization. I will also comment
on the applicability of these
results in space and astrophysical
contexts.
Slides -- Related works: [1]; [2]