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PRODID:UW-Madison-Physics-Events
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SEQUENCE:1
UID:UW-Physics-Event-8956
DTSTART:20241104T180500Z
DTEND:20241104T190000Z
DTSTAMP:20260413T184847Z
LAST-MODIFIED:20241028T020245Z
LOCATION:1610 Engineering Hall
SUMMARY:A novel parallel-kinetic-perpendicular moment model for magnet
 ized plasmas\, Plasma Physics (Physics/ECE/NE 922) Seminar\, James Jun
 o\, Princeton Plasma Physics Laboratory
DESCRIPTION:Many plasma systems\, from pulsar magnetospheres to magnet
 ic confinement devices\, are highly magnetized. Simultaneously these m
 yriad of plasma environments are often sufficiently tenuous and hot to
  be best described by kinetic theory and the full six dimensional Bolt
 zmann-Maxwell system of equations\, thus making these systems computat
 ionally demanding to model. To facilitate new kinetic models of magnet
 ized plasmas\, I will discuss a recent innovation which separates the 
 parallel and perpendicular dynamics starting from the kinetic equation
  while staying agnostic to the inclusion of effects important to consi
 der in diverse environments\, such as strong flows in certain fusion r
 eactors\, relativistic energies in astrophysical plasmas\, or complex 
 boundary conditions and geometry in lab plasma modeling. The key compo
 nent of the derivation lies in a spectral expansion of only the perpen
 dicular degrees of freedom\, analogous to spectral methods which have 
 grown in popularity in recent years for gyrokinetics\, while retaining
  the complete dynamics parallel to the magnetic field. We thus leverag
 e our intuition that a magnetized plasma’s motion is different paral
 lel and perpendicular to the magnetic field\, allowing for the treatme
 nt of complex phase space dynamics parallel to the magnetic field but 
 at reduced computational cost. This approach also naturally couples to
  Maxwell’s equations\, thus permitting everything from a transition 
 across energy scales in astrophysical plasmas to the straightforward i
 nclusion of all aspects of an experiment\, from vacuum regions to exte
 rnal coils. The utility of this approach will be demonstrated with a v
 ariety of classic benchmarks of turbulence and reconnection\, along wi
 th simulations of laboratory plasma experiments.
URL:https://www.physics.wisc.edu/events/?id=8956
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