BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:5
UID:UW-Physics-Event-8093
DTSTART:20230216T203000Z
DTEND:20230216T213000Z
DTSTAMP:20260414T121659Z
LAST-MODIFIED:20230217T193039Z
LOCATION:CH4274/Invite Link Invite Link https://uwmadison.zoom.us/j/95
 966363807?pwd=MGZ6ckc2TXQweDA3YjVEc0Q5UXdmUT09 
SUMMARY:Particle acceleration in astrophysical\, magnetized turbulent 
 plasmas\, NPAC (Nuclear/Particle/Astro/Cosmo) Forum\, Martin Lemoine \
 , Institut d’Astrophysique de Paris\, CNRS
DESCRIPTION:How magnetized turbulent plasmas can accelerate charged
\n
 particles to high energies represents a long-standing question with
\n
 far-reaching implications for high-energy and multi-messenger
\nastrop
 hysics. It indeed goes back to the seminal works of Enrico Fermi (1949
 \, 1954) and nowadays\, it is commonly invoked to model the
\ngenerati
 on of non-thermal particle spectra in a broad variety of
\nastrophysic
 al sites\, including extreme\, relativistic sources. In
\nparticular\,
  it has recently been considered as a possible origin for the high-ene
 rgy neutrinos seen by Ice Cube in the direction of nearby active galac
 tic nuclei.
\nOur understanding of particle acceleration in turbulent 
 plasmas has
\nknown substantial progress in recent years\, mostly spur
 red by
\nlarge-scale\, kinetic numerical simulations. This talk will a
 ddress those developments and discuss a theoretical picture to describ
 e the physics at play\, based on non-resonant interactions between par
 ticles and velocity structures. This model\, which can be seen as a mo
 dern implementation of the original Fermi scenario\, appears supported
  by recent numerical simulations of turbulence in the semi- and fully-
 relativistic regime. It also brings to light an interesting connection
  between the properties of intermittency of the turbulence and the spe
 ctrum of accelerated particles. I will discuss those features then con
 clude with some possible applications and extensions.
\n
URL:https://www.physics.wisc.edu/events/?id=8093
END:VEVENT
END:VCALENDAR