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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-9061
DTSTART:20250123T213000Z
DTEND:20250123T223000Z
DTSTAMP:20260413T222346Z
LAST-MODIFIED:20250121T165420Z
LOCATION:4421 Sterling Hall
SUMMARY:Particle Acceleration by Astrophysical Shocks: A Microphysical
  Perspective\, Astronomy Colloquium\, Karol Fulat\, UW-Madison
DESCRIPTION:Shock waves are ubiquitous astrophysical phenomena associa
 ted with powerful sources\, e.g.\, supernovae\, active galactic nuclei
 \, and gamma-ray bursts. These shocks are collisionless\, meaning that
  the energy is transferred between particles\, electromagnetic fields\
 , and bulk flows by wave-particle interactions\, rather than binary Co
 ulomb collisions. Such shocks are known to be efficient accelerators o
 f charged particles and are plausible sites of cosmic ray production. 
 However\, the primary acceleration mechanism\, diffusive shock acceler
 ation\, does not describe physics on particle kinetic scales. Since sh
 ock acceleration is in general a nonlinear and multiscale process\, pa
 rticle-scale phenomena are crucial. I will discuss the shock microphys
 ics and particle acceleration mechanisms revealed by fully kinetic num
 erical simulations.
URL:https://www.physics.wisc.edu/events/?id=9061
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