Understanding non-equilibrium collisional and expansion effects in the solar wind with Parker Solar Probe

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