Global simulation of magnetosonic wave instability in the storm time magnetosphere

By Lunjin Chen, R. Thorne, Vania Jordanova, R. Horne. 2010

180 citations recorded by the source corpus.

Coupling between the Rice Convection Model and Ring Current-Atmospheric Interactions Model codes is used to simulate the dynamical evolution of ring current ion phase space density and the thermal electron density distribution for the 22 April 2001 storm. The simulation demonstrates that proton ring distributions (df(perpendicular to)/dv(perpendicular to) > 0) develop over a broad spatial region during the storm main phase, leading to the instability of equatorial magnetosonic waves. Calculations of the convective growth rate of magnetosonic waves for multiples of the proton gyrofrequency from 2 to 42 are performed globally. We find that the ratio between the perpendicular ring velocity and the equatorial Alfven speed determines the frequency range of unstable magnetosonic waves. Low harmonic waves (omega 20 Omega(H+)) are excited over a broad spatial region of low density outside the morningside plasmasphere

Subfields: Astronomy and Astrophysics, Geophysics

View Paper: https://www.semanticscholar.org/paper/3f47532acc2a8f88935ca6c6faedda61104a7215

How researchers see this paper

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In Astronomy and Astrophysics

1. Wen Li
2. R. Thorne
3. Craig Kletzing
4. W. Kurth
5. G. Hospodarsky
6. Qianli D. Y. Ma
7. Vania Jordanova
8. V. Angelopoulos

In Geophysics

1. Wen Li
2. R. Thorne
3. V. Angelopoulos
4. Craig Kletzing
5. Vania Jordanova
6. Qianli D. Y. Ma
7. W. Kurth
8. G. Hospodarsky

Citations in the corpus

• Radiation belt dynamics: The importance of wave‐particle interactions (2010, methodology): “Kinetic modeling of ring current ion evolution with the RAM code has been employed to simulate the development of ion rings and the global distribution and spectral properties of MS wave growth [Chen et al., 2010b].”
• Global distribution of equatorial magnetosonic waves observed by THEMIS (2013, methodology): “…and Radiation Effects Satellite (CRRES) data provided the global electric field intensity distribution in the frequency band of 0.5fLHR < f < fLHR, but the CRRES data coverage was very limited on the dayside close to the equator, where MS waves are expected to frequently occur [Chen et al., 2010].”
• The Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) on RBSP (2013, background): “The waves are observed both inside and outside the plasmapause and are excited by a cyclotron resonant instability with a ring distribution of injected ring current ions (Horne et al. 2000; Meredith et al. 2008; Chen et al. 2010b).”