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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:4
UID:UW-Physics-Event-8965
DTSTART:20250912T203000Z
DTEND:20250912T213000Z
DTSTAMP:20260410T212409Z
LAST-MODIFIED:20250902T195134Z
LOCATION:Chamberlin 2241
SUMMARY:Dissipation and Excitation: Kinetic-Scale Waves and Instabilit
 ies in the Heliosphere\, Physics Department Colloquium\, Kristopher Kl
 ein\, University of Arizona
DESCRIPTION:One of the outstanding problems in plasma physics is quant
 ifying the distribution and flow of energy in weakly collisional plasm
 as\, such as the solar wind as it is ejected from the Sun’s surface 
 and travels through the solar system. Studying these processes in the 
 solar wind is necessary to characterize the energy budget in the helio
 sphere and serves as a natural laboratory for studying analogous astro
 physical and laboratory systems. There are a number of competing mecha
 nisms that have been proposed to govern the transport and dissipation 
 of energy that are expected to dominate under different conditions\, i
 ncluding the excitation and dissipation of kinetic-scale waves. Such w
 aves are observed in the inner heliosphere\, coincident with non-Maxwe
 llian velocity distributions. More detailed velocity distribution meas
 urements\, enabled by recent in situ missions including Magnetospheric
  Multiscale Mission\, Parker Solar Probe\, and Solar Orbiter\, allow f
 or more sophisticated studies of wave generation and dissipation.  Thi
 s talk will review these recent studies and consider how future multip
 oint\, multiscale missions such as HelioSwarm will continue to improve
  our understanding of the thermodynamic role of ion-scale waves and fl
 uctuations in plasmas throughout the Universe.
URL:https://www.physics.wisc.edu/events/?id=8965
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