Van Allen Probe observations of drift-bounce resonances with Pc 4 pulsations and wave-particle interactions in the pre-midnight inner magnetosphere

Academic Article


  • <p><strong>Abstract.</strong> 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 06:00 UT 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 energy-dependent response of the ion fluxes results from pulsation-associated velocities sweeping energy-dependent radial ion flux gradients back and forth past the spacecraft.</p>
  • Authors

  • Korotova, GI
  • Sibeck, DG
  • Tahakashi, K
  • Dai, L
  • Spence, Harlan
  • Kletzing, CA
  • Wygant, JR
  • Manweiler, JW
  • Moya, PS
  • Hwang, K-J
  • Redmon, RJ
  • Status

    Publication Date

  • 2015
  • Published In


  • Solar physics astrophysics and astronomy
  • wave-particle interactions
  • Digital Object Identifier (doi)

    Start Page

  • 955
  • End Page

  • 964
  • Volume

  • 33
  • Issue

  • 8