BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-2656
DTSTART:20120416T170500Z
DURATION:PT1H0M0S
DTSTAMP:20240329T060136Z
LAST-MODIFIED:20120412T194237Z
LOCATION:2535 Engineering Hall
SUMMARY:Kinetic Turbulence in Space and Astrophysical Plasmas: Theoret
ical\, Numerical\, and Experimental Investigations\, Plasma Physics (P
hysics/ECE/NE 922) Seminar\, Prof. Greg Howes\, University of Iowa
DESCRIPTION:In many turbulent space and astrophysical plasma environme
nts\, the
\ndissipation of the turbulence\, and consequent convers
ion of turbulent
\nfluctuation energy to plasma heat\, occurs at s
cales on which the plasma
\ndynamics is collisionless. Direct acce
ss to the near Earth solar wind provides a
\nunique opportunity to
confront our understanding of the dynamics of kinetic
\nplasma tu
rbulence\, and its dissipation via collisionless damping mechanisms\,<
br>
\nwith in situ spacecraft measurements. Significant effort has rec
ently been
\nfocused on employing the gyrokinetic formalism to stu
dy the dissipation of
\nturbulence in the solar wind\, taking adva
ntage of sophisticated numerical
\ntechniques developed for use in
the fusion community. Here I will report on
\nsome of the most re
cent successes of this effort\, in particular the first threedimension
al\,
\nnonlinear gyrokinetic simulation of plasma turbulence resol
ving
\nscales from the ion to electron gyroradius with a realistic
mass ratio\, where all
\ndamping is provided by resolved physical
mechanisms. Complementing this
\ntheoretical and numerical resear
ch program are experiments on the Large
\nPlasma Device (LAPD) at
UCLA to measure the nonlinear interactions between
\ncounterpropag
ating Alfven waves\, the fundamental building block of Alfvenic
\n
plasma turbulence.
URL:https://www.physics.wisc.edu/events/?id=2656
END:VEVENT
END:VCALENDAR