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PRODID:UW-Madison-Physics-Events
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SEQUENCE:1
UID:UW-Physics-Event-4924
DTSTART:20181015T170500Z
DURATION:PT1H0M0S
DTSTAMP:20260419T040427Z
LAST-MODIFIED:20181009T164027Z
LOCATION:2241 Chamberlin Hall
SUMMARY:Relativistic Hybrid Simulations of Cosmic Ray Generation and T
 ransport\, Plasma Physics (Physics/ECE/NE 922) Seminar\, Dr. Colby Hag
 gerty\, University of Chicago
DESCRIPTION:The generation and transport of Cosmic Rays (CR) is an inh
 erently multiscale phenomenon. Linking the dynamics of a cold thermal 
 background plasma with low density\, relativistic CRs through the shar
 ed magnetic field requires modeling the physics of both populations.
\
 n To better study these problems\, we have developed a kinetic ion\, f
 luid electron hybrid code to include relativistic ion dynamics (dHybri
 dR).
\n With dHybridR\, we perform the first simulations of non relati
 vistic collisionless shock\, self-consistently accelerating relativist
 ic ions. We document the effects of the transition of accelerated part
 icles to relativistic velocities and we show that the shock develops a
  CR induced precursor which modifies the macroscopic shock quantities 
 (i.e. compression ratio and shock speed). In addition to CR generation
 \, we present simulations of CR transport and the as sociated streamin
 g instabilities. We show that for weak CR currents\, simulations initi
 ally agree with linear theory and that the thermal population is indir
 ectly heated through landau damping.
URL:https://www.physics.wisc.edu/events/?id=4924
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