%ABirn, J. [Space Science Institute Boulder CO USA, Los Alamos National Laboratory Los Alamos NM USA]%AHesse, M. [Department of Physics and Technology University of Bergen Bergen Norway, NASA Ames Research Center Moffett Field CA USA]%ABingham, S. [Space Exploration Sector The Johns Hopkins University Applied Physics Laboratory Laurel MD USA]%ATurner, D. [Space Exploration Sector The Johns Hopkins University Applied Physics Laboratory Laurel MD USA]%ANakamura, R. [Space Research Institute Austrian Academy of Sciences Graz Austria]%BJournal Name: Journal of Geophysical Research: Space Physics; Journal Volume: 126; Journal Issue: 7; Related Information: CHORUS Timestamp: 2023-08-23 01:12:14 %D2021%IDOI PREFIX: 10.1029 %JJournal Name: Journal of Geophysical Research: Space Physics; Journal Volume: 126; Journal Issue: 7; Related Information: CHORUS Timestamp: 2023-08-23 01:12:14 %K %MOSTI ID: 10369919 %PMedium: X %TAcceleration of Oxygen Ions In Dipolarization Events: 2. PSBL Distributions %X
This paper represents the second part of an investigation of the acceleration of energetic oxygen ions from encounters with a dipolarization front (DF), based on test particle tracing in the fields of an MHD simulation. In this paper, we focus on distributions in the plasma sheet boundary layer (PSBL). O+beams close to the plasma sheet boundary are found to be less pronounced and/or delayed against the H+beams. The reason is that these particles are accelerated by nonadiabatic motion in the duskward electric field such that O+ions gain the same amount of energy, but only 1/4 of the speed of protons. This causes a delay and larger equatorward displacement by the