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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-4124
DTSTART:20160314T170000Z
DTEND:20160314T180000Z
DTSTAMP:20260420T020727Z
LAST-MODIFIED:20160302T215258Z
LOCATION:1153 Mechanical Engineering
SUMMARY:Magnetic pumping of the solar wind\, and new results from the 
 Terrestrial Reconnection Experiment (TREX)\, Plasma Physics (Physics/E
 CE/NE 922) Seminar\, Jan Egedal\, UW Madison
DESCRIPTION:The transport of matter and radiation in the solar wind an
 d terrestrial magnetosphere is a complicated problem involving competi
 ng processes of charged particles interacting with electric and magnet
 ic fields in a turbulent medium. Given the rapid expansion of the sola
 rwind\, it would be expected that superthermal electrons originating i
 n the corona would cool rapidly as a function of distance to the Sun. 
 However\, this is not observed\, and various models have been proposed
  as plausible candidates for heating the solar wind as it super-sonica
 lly streams away from the sun. Here we investigate magnetic pumping as
  a possible heating source. The mechanism allows energy to be transfer
 red to the particles directly from the largest scales of the solar win
 d turbulence. Guided by kinetic simulations a theory is derived for ma
 gnetic pumping\, expressed through a generalization of the Parker Equa
 tion to capture the role of the pressure anisotropy during the pumping
  process. In the talk I will also discuss the latest results from the 
 Terrestrial Reconnection Experiment. These results include the formati
 on of collisionless reconnection layers\, strongly modulated by the pl
 asmoid instability.  
URL:https://www.physics.wisc.edu/events/?id=4124
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