Bulletin of the American Physical Society
54th Annual Meeting of the APS Division of Plasma Physics
Volume 57, Number 12
Monday–Friday, October 29–November 2 2012; Providence, Rhode Island
Session KI3: Laboratory Astrophysical Plasmas II
3:00 PM–5:00 PM,
Tuesday, October 30, 2012
Room: Ballroom BC
Chair: S. Lebedev, Imperial College London
Abstract ID: BAPS.2012.DPP.KI3.4
Abstract: KI3.00004 : Constraints on the Dissipation of Solar Wind Turbulence using Gyrokinetic Simulations*
4:30 PM–5:00 PM
Preview Abstract Abstract
(University of Iowa)
Gyrokinetic simulation codes, developed to a high level of sophistication in the fusion energy science program, are well suited for the study of turbulence in weakly collisional space and astrophysical plasmas, such as the solar wind. A number of exciting results have recently been achieved in the study of the dissipation range of solar wind turbulence using the Astrophysical Gyrokinetics code, AstroGK. Important results include: (1) a magnetic energy spectrum over the entire dissipation range (from ion to electron scales) that shows striking agreement with high resolution spacecraft observations, (2) evidence for an anisotropic distribution of energy in wavevector space in agreement with arguments for critically balanced kinetic Alfven wave turbulence, (3) an exponentially decaying form of the magnetic energy spectrum at the scale of the electron Larmor radius in agreement with recent observations, and (4) constraints on the partitioning of turbulent power dissipation between collisionless wave-particle interactions and dissipation in current sheets.
*Funding provided by NSF CAREER Award AGS-1054061 and NASA PECASE Award NNX10AC91G. Computational resources provided by Oak Ridge Leadership Computing Facility and the NSF National Institute for Computational Sciences.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2012.DPP.KI3.4
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