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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:2
UID:UW-Physics-Event-6461
DTSTART:20210625T153000Z
DURATION:PT1H0M0S
DTSTAMP:20260414T220427Z
LAST-MODIFIED:20210618T162335Z
LOCATION:B343 Sterling Hall 
SUMMARY:The Formation of Parallel and Perpendicular Collisionless Shoc
 ks on the Big Red Ball\, Thesis Defense\, Doug Endrizzi\, Physics PhD 
 Graduate Student
DESCRIPTION:Collisionless shocks are common in space environments. Unl
 ike collisional shocks\, where the dissipation of flow kinetic energy 
 into thermal energy is well described by the Rankine-Hugoniot shock ju
 mp conditions\, collisionless shocks are often not: they can have an u
 nequal partition of energy between particle species\, produce electrom
 agnetic waves and radiation\, and even accelerate cosmic rays. A good 
 understanding of the structure of such shocks will help interpret many
  astrophysical systems. But producing collisionless shocks in the labo
 ratory to test theoretical models and simulations is a challenge. To b
 e presented are results from laboratory experiments exploring shocks t
 hat are both parallel and perpendicular to the background magnetic fie
 ld. Two characteristic collisionless shock dissipation mechanisms were
  observed together in experiment for the first time: reflected ions an
 d large amplitude Whistler waves. This provides nice experimental corr
 oboration of the ‘pulsation shock’ model of the Earth’s quasi-pa
 rallel bow shock. Future experimental work will be suggested. https://
 uwmadison.zoom.us/j/92535586865
URL:https://www.physics.wisc.edu/events/?id=6461
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