JpGU-AGU Joint Meeting 2017

Presentation information

[EE] Oral

P (Space and Planetary Sciences) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM16] [EE] Physics of Inner Magnetosphere Coupling

Wed. May 24, 2017 9:00 AM - 10:30 AM A02 (Tokyo Bay Makuhari Hall)

convener:Danny Summers(Memorial University of Newfoundland), Jichun Zhang(University of New Hampshire Main Campus), Yusuke Ebihara(Research Institute for Sustainable Humanosphere, Kyoto University), Kunihiro Keika(Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo ), Aleksandr Y Ukhorskiy(Johns Hopkins University Applied Physics Laboratory), Dae-Young Lee(Chungbuk Natl Univ), Yiqun Yu(Beihang University), Yoshizumi Miyoshi(Institute for Space-Earth Environmental Research, Nagoya University), Chairperson:Jichun Zhang(University of New Hampshire Main Campus)

10:00 AM - 10:15 AM

[PEM16-23] Van Allen Probes Observations of Particle Injections and ULF Waves During Lapping Events

*Hyomin Kim1, Louis Lanzerotti1, Andrew Gerrard1, Khan-Hyuk Kim2, Dae-Young Lee3, Rualdo Soto-Chavez1, Ross Cohen1, Craig Kletzing4, Jerry W Manweiler5 (1.Center for Solar-Terrestrial Research, New Jersey Institute of Technology, USA, 2.School of Space Research, Kyung Hee University, S. Korea, 3.Department of Astronomy and Space Science, Chungbuk National University, S. Korea, 4.Department of Physics and Astronomy, The University of Iowa, USA, 5.Fundamental Technologies, LLC, USA)

Keywords:Ring current, ULF waves, injection

The twin Van Allen Probes mission provides unique data sets for the studies of radiation belt and ring current dynamics thanks to their orbit configuration and coverage, and state of the art instrumentation with high energy and time resolutions. This study presents mid- to high-energy particle injection and wave events associated with storm and substorm activities when the twin spacecraft were very close to each other (called “lapping event”). The lapping events enable us to investigate the wave-particle interaction on an unprecedented spatial and temporal scale. The events presented here show that mid-energy (a few to hundreds of keV) injected particles provide energy to generate electromagnetic ion cyclotron (EMIC) and ultra low frequency (ULF) waves, resulting in scattering of high-energy (a few MeV) electrons in the radiation belt. Clear one-to-one correspondence between waves and particles with high energy and time resolution is demonstrated. Because of the spacecraft’s lapping during multiple consecutive fly-bys, detailed spatial and temporal structures of the wave-particle interaction are revealed.