SH32A:
Frontiers of Solar Wind Physics: Collisions and Velocity Space

Submit an Abstract to this Session



Session ID#: 31382

Session Description:
Particle distribution functions in space plasmas often exhibit kinetic
structures including temperature anisotropies, drifts, and general nonthermal structure, indicating that the plasma is
weakly collisional. However, studies of solar wind collisional age
have revealed that particle collisions affect the evolution of
plasma as it expands through the heliosphere, indicating that a
complete description of the solar wind must account for
macrophysical expansion effects, microphysical collisionless
processes, and Coulomb collisions.

This session focuses on innovative diagnostic techniques,
analysis methods, and modeling efforts that utilize information from nonthermal
velocity-space structure, including field-particle correlations and
Hermite transformations, which may identify the collisionless processes that govern
plasma heating and particle energization in the solar wind. This
session also addresses how the combined actions of expansion,
collective plasma processes, and collisional relaxation determine the
state of the solar wind. Investigations that exploit particle velocity distribution function
measurements in weakly collisional plasmas are solicited, as are works
that will stimulate an interdisciplinary discussion of global and
local plasma effects in the solar wind.

Primary Convener:  Prof. Kristopher Gregory Klein, University of Michigan Ann Arbor, Ann Arbor, MI, United States
Conveners:  Jason M TenBarge, Princeton University, Princeton, NJ, United States, Bennett Maruca, Center for Astrophysics, Berkeley, CA, United States and Daniel Verscharen, University College London, Mullard Space Science Laboratory, Dorking, United Kingdom
Chairs:  Jason M TenBarge, Princeton University, Princeton, NJ, United States and Prof. Kristopher Gregory Klein, University of Michigan Ann Arbor, Ann Arbor, MI, United States
OSPA Liaison:  Bennett Maruca, University of Delaware, Department of Physics and Astronomy, Newark, DE, United States
Index Terms:

7829 Kinetic waves and instabilities [SPACE PLASMA PHYSICS]
7846 Plasma energization [SPACE PLASMA PHYSICS]
7859 Transport processes [SPACE PLASMA PHYSICS]
7867 Wave/particle interactions [SPACE PLASMA PHYSICS]

Abstracts Submitted to this Session:

Understanding non-equilibrium collisional and expansion effects in the solar wind with Parker Solar Probe (Invited) (207713)
Kelly E Korreck, Smithsonian Astrophysical Observatory, Cambridge, MA, United States, Prof. Kristopher Gregory Klein, University of Arizona, Lunar and Planetary Laboratory, Tucson, AZ, United States, Bennett Maruca, Center for Astrophysics, Berkeley, CA, United States and Benjamin L. Alterman, Southwest Research Institute, Space Science and Engineering, San Antonio, United States
Kinetic-scale fluctuations resolved with the Fast Plasma Investigation on NASA's Magnetospheric Multiscale mission. (Invited) (214252)
Daniel J Gershman1, Adolfo Figueroa-Vinas2, John C Dorelli2, Melvyn L Goldstein3, Jason R Shuster4, Levon A Avanov2, Scott A Boardsen5, Julia E Stawarz6, Steven J Schwartz7, Conrad Schiff2, Benoit Lavraud8, Yoshifumi Saito9, William R Paterson10, Barbara L Giles4, Craig J Pollock11, Robert J Strangeway12, Christopher T Russell13, Roy B Torbert14, Thomas Earle Moore15 and James L Burch14, (1)University of Maryland College Park, College Park, United States, (2)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (3)Space Science Institute Boulder, Boulder, United States, (4)NASA Goddard Space Flight Center, Greenbelt, United States, (5)Goddard Planetary Heliophysics Institute, Greenbelt, MD, United States, (6)Imperial College London, Department of Physics, London, United Kingdom, (7)Imperial College London, London, United Kingdom, (8)Laboratoire d'astrophysique de Bordeaux, Pessac, France, (9)ISAS Institute of Space and Astronautical Science, Kanagawa, Japan, (10)NASA Goddard Space Flight Center, Geospace Physics Laboratory, Greenbelt, MD, United States, (11)Denali Scientific, San Antonio, TX, United States, (12)University of California Los Angeles, Earth, Planetary, and Space Sciences, Los Angeles, United States, (13)University of California Los Angeles, Los Angeles, United States, (14)Southwest Research Institute, San Antonio, United States, (15)NASA Goddard Space Flight Center, Heliophysics Sci. Div., Greenbelt, MD, United States
A Deeper Understanding of Stability in the Solar Wind: Applying Nyquist's Instability Criterion to Wind Faraday Cup Data (267095)
Benjamin L. Alterman1, Prof. Kristopher Gregory Klein2, Daniel Verscharen3, Michael Louis Stevens4 and Justin Christophe Kasper4, (1)University of Michigan Ann Arbor, Ann Arbor, MI, United States, (2)University of Arizona, Lunar and Planetary Laboratory, Tucson, AZ, United States, (3)University College London, Mullard Space Science Laboratory, Dorking, United Kingdom, (4)Smithsonian Astrophysical Observatory, Cambridge, MA, United States
Control Mechanisms of the Electron Heat Flux in the Solar Wind: Observations in Comparison to Numerical Simulations (238427)
Stepan Stverak1,2, Petr Hellinger3, Simone Landi4, Pavel M. Travnicek1,5 and Milan Maksimovic6, (1)Astronomical Institute AS CR, Prague, Czech Republic, (2)Institute of Atmospheric Physics ACSR, Praha 4, Czech Republic, (3)Astronomical Institute & Institute of Atmospheric Physics, AS CR, Prague, Czech Republic, (4)University of Florence, Florence, Italy, (5)University of California Berkeley, Space Sciences Laboratory, Berkeley, CA, United States, (6)LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université Paris Diderot, Sorbonne Paris Cité, Meudon, France, Meudon, France
Examining the Evolution of Solar Wind Strahl: What Can We Determine About Potential Scattering Mechanisms? (255991)
Georgina Alessandra Graham1, Jonathan Rae2, Christopher John Owen3, Andrew P Walsh4, Christopher Stephen Arridge5, Lin Gilbert6, Gethyn Lewis7, Geraint Jones8, Colin Forsyth7, Andrew J Coates9 and Jack H Waite10, (1)Mullard Space Science Laboratory, Dorking, RH5, United Kingdom, (2)University College London, Mullard Space Science Laboratory, London, United Kingdom, (3)UCL, Mullard Space Science Laboratory, Dorking, United Kingdom, (4)European Space Agency, Villanueva De La Can, Spain, (5)Lancaster University, Department of Physics, Lancaster, United Kingdom, (6)University College London, London, United Kingdom, (7)UCL Mullard Space Science Laboratory, Dorking, United Kingdom, (8)Mullard Space Science Laboratory, Dorking, United Kingdom, (9)Centre for Planetary Sciences at UCL/Birkbeck, London, United Kingdom, (10)Department of Space Science, Southwest Research Institute, San Antonio, United States
Modeling Solar Wind Expansion with Wave-Particle Interactions and Coulomb Collisions (Invited) (235692)
Lorenzo Matteini1, Petr Hellinger2, Simone Landi3, Filippo G E Pantellini4, Marco C M Velli5, Luca Franci3 and Andrea Verdini3, (1)Observatoire De Paris, LESIA, Meudon, FRANCE, (2)Astronomical Institute & Institute of Atmospheric Physics, AS CR, Prague, Czech Republic, (3)University of Florence, Florence, Italy, (4)CNRS, Observatoire de Paris, LESIA, Meudon, France, (5)University of California Los Angeles, Los Angeles, CA, United States
Suppression of Phase Mixing in Drift-Kinetic Plasma Turbulence (Invited) (212733)
Joseph Thomas Parker1, Paul J Dellar2, Alexander A Schekochihin2 and Edmund G Highcock3, (1)Science and Technology Facilities Council, Didcot, OX11, United Kingdom, (2)University of Oxford, Oxford, United Kingdom, (3)Chalmers University of Technology, Gothenburg, Sweden
Nonlinear Evolution of Observed Fast Streams in the Solar Wind – Micro-instabilities and Energy Exchange between Protons and Alpha Particles (278037)
Yana G Maneva, Katholieke Universiteit Leuven, Leuven, Belgium and Stefaan Poedts, KU Leuven, Centre for mathematical Plasma-Astrophysics, Leuven, Belgium
A New Global Multi-fluid MHD Model of the Solar Corona (246643)
Bart van der Holst1, Benjamin D G Chandran2, Benjamin L. Alterman3, Justin Christophe Kasper4 and Gabor Toth4, (1)University of Michigan Ann Arbor, Department of Climate and Space Sciences and Engineering, Ann Arbor, MI, United States, (2)University of New Hampshire, Durham, United States, (3)Southwest Research Institute, Space Science and Engineering, San Antonio, United States, (4)University of Michigan, Climate and Space Sciences and Engineering, Ann Arbor, United States

See more of: SPA-Solar and Heliospheric Physics