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UID:UW-Physics-Event-5396
DTSTART:20200306T213000Z
DURATION:PT1H0M0S
DTSTAMP:20260415T040914Z
LAST-MODIFIED:20200227T212328Z
LOCATION:2241 Chamberlin Hall
SUMMARY:Advances in Understanding Relativistic Plasma Turbulence\, Phy
 sics Department Colloquium\, Vladimir Zhdankin\, Princeton
DESCRIPTION:Many distant high-energy astrophysical systems (such as pu
 lsar wind nebulae\, black-hole accretion flows\, and jets from active 
 galactic nuclei) contain collisionless plasmas that are relativistic\,
  radiative\, and highly nonthermal. Understanding the nature of turbul
 ence in this extreme plasma physical regime and its implications for o
 bservations is an outstanding challenge in plasma astrophysics. Partic
 le-in-cell (PIC) simulations have recently opened this topic to detail
 ed\, first-principles numerical and theoretical scrutiny. I will descr
 ibe the latest progress on understanding relativistic kinetic turbulen
 ce. PIC simulations have demonstrated that relativistic turbulence is 
 an efficient particle accelerator\, joining the ranks of shocks and ma
 gnetic reconnection as a viable source of high-energy particles (and t
 hus broadband radiation and cosmic rays). These simulations are now gi
 ving long-awaited tests for a line of analytic theories of stochastic 
 particle acceleration originating with Enrico Fermi in 1949. Relativis
 tic PIC simulations are also giving new insights into two-temperature 
 electron-ion plasmas and radiative turbulence. The next several years 
 promise to bring new breakthroughs into these problems.
URL:https://www.physics.wisc.edu/events/?id=5396
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