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- Title
Van Allen Probe observations of drift-bounce resonances with Pc 4 pulsations and wave--particle interactions in the pre-midnight inner magnetosphere.
- Authors
Korotova, G. I.; Sibeck, D. G.; Tahakashi, K.; Dai, L.; Spence, H. E.; Kletzing, C. A.; Wygant, J. R.; Manweiler, J. W.; Moya, P. S.; Hwang, K.-J.; Redmon, R. J.
- Abstract
We present Van Allen Probe B observations of azimuthally limited, antisymmetric, poloidal Pc 4 electric and magnetic field pulsations in the pre-midnight sector of the magnetosphere from 05:40 to 06:00UT on 1 May 2013. Oscillation periods were similar for the magnetic and electric fields and proton fluxes. The flux of energetic protons exhibited an energy-dependent response to the pulsations. Energetic proton variations were anticorrelated at medium and low energies. Although we attribute the pulsations to a drift-bounce resonance, we demonstrate that the energydependent response of the ion fluxes results from pulsationassociated velocities sweeping energy-dependent radial ion flux gradients back and forth past the spacecraft.
- Subjects
PULSATION (Electronics); WAVE-particle interactions; MAGNETOSPHERE; MAGNETIC fields; FLUX (Energy)
- Publication
Annales Geophysicae (ANGEO) (09927689), 2015, Vol 33, Issue 8, p955
- ISSN
0992-7689
- Publication type
Article
- DOI
10.5194/angeo-33-955-2015