Nonstorm time scattering of ring current protons by electromagnetic ion cyclotron waves

We report correlated observation of enhanced electromagnetic ion cyclotron (EMIC) waves and dynamic evolution of ring current proton flux collected by Cluster satellite near the location L = 4.5 during March 26-27, 2003, a nonstorm period (D-st > -10). Energetic (5-30 keV) proton fluxes are found to drop rapidly (e.g., a half hour) at lower pitch angles, corresponding to intensified EMIC wave activities. By adopting a Gaussian fit to the observed spectra of EMIC waves, we present two-dimensional (2D) numerical simulations which demonstrate that EMIC wave can yield such decrements in proton flux within 30 minutes, consistent with the observational data. The current result provides a further understanding of ring current dynamics driven by wave-particle interaction under different geomagnetic activities.

[1]  Sai Zhang,et al.  Rapid acceleration of radiation belt energetic electrons by Z‐mode waves , 2012 .

[2]  J. Bortnik,et al.  The controlling effect of ion temperature on EMIC wave excitation and scattering , 2011 .

[3]  F. Xiao,et al.  Modeling for precipitation loss of ring current protons by electromagnetic ion cyclotron waves , 2011 .

[4]  Chang Yang,et al.  Interaction between electromagnetic waves and energetic particles by a realistic density model , 2010 .

[5]  R. Horne,et al.  Global simulation of EMIC wave excitation during the 21 April 2001 storm from coupled RCM‐RAM‐HOTRAY modeling , 2010 .

[6]  Q. Zong.  Energetic electrons response to ULF waves induced by interplanetary shocks in the outer radiation belt , 2010 .

[7]  M. W. Dunlop,et al.  Energetic electron response to ULF waves induced by interplanetary shocks in the outer radiation belt , 2009 .

[8]  R. Horne,et al.  Simulation of EMIC wave excitation in a model magnetosphere including structured high-density plumes , 2009 .

[9]  F. Xiao,et al.  Modeling of outer radiation belt electrons by multidimensional diffusion process , 2009 .

[10]  A. Chan,et al.  Numerical Modeling of Multidimensional Diffusion in the Radiation Belts using Layer Methods , 2009 .

[11]  Q. Zong,et al.  Recent progress on ULF wave and its interactions with energetic particles in the inner magnetosphere , 2008 .

[12]  F. Xiao,et al.  Energetic particles modeled by a generalized relativistic kappa-type distribution function in plasmas , 2008 .

[13]  James A. Miller,et al.  Stochastic modeling of multidimensional diffusion in the radiation belts , 2008 .

[14]  B. Ni,et al.  Resonant scattering of plasma sheet electrons by whistler‐mode chorus: Contribution to diffuse auroral precipitation , 2008 .

[15]  K. Shiokawa,et al.  Simultaneous appearance of isolated auroral arcs and Pc 1 geomagnetic pulsations at subauroral latitudes , 2008 .

[16]  F. Xiao,et al.  Energetic electron distributions fitted with a relativistic kappa‐type function at geosynchronous orbit , 2008 .

[17]  Qinghua Zhou,et al.  Modeling solar energetic particle by a relativistic kappa-type distribution , 2008 .

[18]  V. Jordanova,et al.  Relativistic electron precipitation by EMIC waves from self‐consistent global simulations , 2008 .

[19]  B. Ni,et al.  Resonance Zones for Electron Interaction with Plasma Waves in the Earth's Dipole Magnetosphere , 2007 .

[20]  M. Spasojević,et al.  Modeling the electromagnetic ion cyclotron wave‐induced formation of detached subauroral proton arcs , 2007 .

[21]  Qinghua Zhou,et al.  Electromagnetic ion cyclotron waves instability threshold condition of suprathermal protons by kappa distribution , 2007 .

[22]  R. Thorne,et al.  Higher-order gyroresonant acceleration of electrons by superluminous (AKR) wave-modes , 2007 .

[23]  D. Baker,et al.  Ultralow frequency modulation of energetic particles in the dayside magnetosphere , 2007 .

[24]  Qinghua Zhou,et al.  Relativistic diffusion coefficients for superluminous (auroral kilometric radiation) wave modes in space plasmas , 2006 .

[25]  Xinlin Li,et al.  Simulating radial diffusion of energetic (MeV) electrons through a model of fluctuating electric and magnetic fields , 2006 .

[26]  Qinghua Zhou,et al.  Instability of whistler-mode waves by a relativistic kappa-loss-cone distribution in space plasmas , 2006 .

[27]  R. Horne,et al.  Phase space density analysis of the outer radiation belt energetic electron dynamics , 2006 .

[28]  F. Xiao,et al.  Modelling energetic particles by a relativistic kappa-loss-cone distribution function in plasmas , 2006 .

[29]  R. Kataoka,et al.  Ring current ions and radiation belt electrons during geomagnetic storms driven by coronal mass ejections and corotating interaction regions , 2005 .

[30]  Xinlin Li,et al.  Modeling the radiation belt electrons with radial diffusion driven by the solar wind , 2005 .

[31]  Danny Summers,et al.  Quasi‐linear diffusion coefficients for field‐aligned electromagnetic waves with applications to the magnetosphere , 2005 .

[32]  Jay M. Albert,et al.  Multidimensional quasi‐linear diffusion of radiation belt electrons , 2005 .

[33]  Richard B. Horne,et al.  Calculation of pitch angle and energy diffusion coefficients with the PADIE code , 2005 .

[34]  D. Baker,et al.  Energetic electrons, 50 keV to 6 MeV, at geosynchronous orbit: Their responses to solar wind variations , 2005 .

[35]  Richard M. Thorne,et al.  Timescale for radiation belt electron acceleration by whistler mode chorus waves , 2005 .

[36]  J. Albert.  Using quasi‐linear diffusion to model acceleration and loss from wave‐particle interactions , 2004 .

[37]  Xinlin Li.  Variations of 0.7–6.0 MeV electrons at geosynchronous orbit as a function of solar wind , 2004 .

[38]  J. Albert.  Evaluation of quasi-linear diffusion coefficients for EMIC waves in a multispecies plasma , 2003 .

[39]  G. Reeves,et al.  Acceleration and loss of relativistic electrons during geomagnetic storms , 2003 .

[40]  R. Horne,et al.  Resonant diffusion of radiation belt electrons by whistler‐mode chorus , 2003 .

[41]  Richard M. Thorne,et al.  Relativistic electron pitch-angle scattering by electromagnetic ion cyclotron waves during geomagnetic storms , 2003 .

[42]  Y. Kasahara,et al.  Rebuilding process of the outer radiation belt during the 3 November 1993 magnetic storm: NOAA and Exos‐D observations , 2003 .

[43]  Mark B. Moldwin,et al.  An empirical plasmasphere and trough density model: CRRES observations , 2001 .

[44]  Daniel N. Baker,et al.  Quantitative prediction of radiation belt electrons at geostationary orbit based on solar wind measurements , 2001 .

[45]  R. Erlandson,et al.  Observations of electromagnetic ion cyclotron waves during geomagnetic storms: Wave occurrence and pitch angle scattering , 2001 .

[46]  Michelle F. Thomsen,et al.  Modeling ring current proton precipitation by electromagnetic ion cyclotron waves during the May 14–16, 1997, storm , 2001 .

[47]  Xinlin Li,et al.  The Electron Radiation Belt , 2001 .

[48]  Jay M. Albert,et al.  Radial diffusion analysis of outer radiation belt electrons during the October 9, 1990, magnetic storm , 2000 .

[49]  M. Hudson,et al.  Resonant enhancement of relativistic electron fluxes during geomagnetically active periods , 1999 .

[50]  J. B. Blake,et al.  Rapid enchancements of relativistic electrons deep in the magnetosphere during the May 15, 1997, magnetic storm , 1999 .

[51]  M. Natarajan,et al.  Solar atmospheric coupling by electrons (SOLACE): 1. Effects of the May 12, 1997 solar event on the middle atmosphere , 1998 .

[52]  R. Thorne,et al.  Relativistic theory of wave‐particle resonant diffusion with application to electron acceleration in the magnetosphere , 1998 .

[53]  J. B. Blake,et al.  The relativistic electron response at geosynchronous orbit during the January 1997 magnetic storm , 1998 .

[54]  Richard M. Thorne,et al.  Potential waves for relativistic electron scattering and stochastic acceleration during magnetic storms , 1998 .

[55]  D. Baker,et al.  Multisatellite observations of the outer zone electron variation during the November 3–4, 1993, magnetic storm , 1997 .

[56]  R. Horne,et al.  Modulation of electromagnetic ion cyclotron instability due to interaction with ring current O+ during magnetic storms , 1997 .

[57]  R. Horne,et al.  Whistler absorption and electron heating near the plasmapause , 1996 .

[58]  C. E. Rasmussen,et al.  Interaction of ring current and radiation belt protons with ducted plasmaspheric hiss: 1. Diffusion coefficients and timescales , 1994 .

[59]  Richard M. Thorne,et al.  On the preferred source location for the convective amplification of ion cyclotron waves , 1993 .

[60]  Donald J. Williams,et al.  Quantitative Aspects of Magnetospheric Physics , 1984 .

[61]  R. Gendrin.  General relationships between wave amplification and particle diffusion in a magnetoplasma , 1981 .

[62]  R. Thorne.  Energetic Radiation Belt Electron Precipitation: A Natural Depletion Mechanism for Stratospheric Ozone , 1977, Science.

[63]  C. Kennel,et al.  Pitch-angle diffusion of radiation belt electrons within the plasmasphere. , 1972 .

[64]  J. Cornwall,et al.  TURBULENT LOSS OF RING-CURRENT PROTONS. , 1970 .