scholarly journals THEMIS observations of long-lived regions of large-amplitude whistler waves in the inner magnetosphere

2008 ◽  
Vol 35 (17) ◽  
Author(s):  
C. M. Cully ◽  
J. W. Bonnell ◽  
R. E. Ergun
Keyword(s):  
Large Amplitude ◽  
Whistler Waves ◽  
Inner Magnetosphere

Nonlinear evolutions of large amplitude oblique whistler waves

2018 ◽  
Vol 25 (6) ◽  
pp. 062904 ◽  
Author(s):  
Kyunghwan Dokgo ◽  
Kyoung-Wook Min ◽  
Cheong-Rim Choi ◽  
Minho Woo ◽  
Peter H. Yoon ◽  
...  
Keyword(s):  
Large Amplitude ◽  
Whistler Waves

scholarly journals Large-amplitude electric fields in the inner magnetosphere: Van Allen Probes observations of subauroral polarization streams

2016 ◽  
Vol 121 (6) ◽  
pp. 5294-5306 ◽  
Author(s):  
S. Califf ◽  
X. Li ◽  
R. A. Wolf ◽  
H. Zhao ◽  
A. N. Jaynes ◽  
...  
Keyword(s):  
Electric Fields ◽  
Large Amplitude ◽  
Inner Magnetosphere ◽  
Van Allen Probes

scholarly journals Spatial spreading of magnetospherically reflected chorus elements in the inner magnetosphere

2013 ◽  
Vol 31 (8) ◽  
pp. 1429-1435 ◽  
Author(s):  
H. Breuillard ◽  
Y. Zaliznyak ◽  
O. Agapitov ◽  
A. Artemyev ◽  
V. Krasnoselskikh ◽  
...  
Keyword(s):  
Equatorial Plane ◽  
Wave Packets ◽  
Experimental Studies ◽  
Realistic Model ◽  
Dispersion Function ◽  
Whistler Waves ◽  
Inner Magnetosphere ◽  
Source Signal ◽  
Ray Trajectories ◽  
Spatial Spreading

Abstract. Chorus-type whistler waves are known to be generated in the vicinity of the magnetic equator, in the low-density plasma trough region. These wave packets propagate towards the magnetic poles, deviating from the magnetic field lines, before being eventually reflected at higher latitudes. Magnetospheric reflection of whistler waves results in bounce oscillations of these waves through the equator. Our study is devoted to the problem of geometrical spreading of these whistler-mode waves after their first magnetospheric reflection, which is crucial to determine where wave–particle interactions occur. Recently, experimental studies stated that the relative intensity of the reflected signal was generally between 0.005 and 0.05 of the source signal. We model such wave packets by means of ray tracing technique, using a warm plasma dispersion function along their trajectory and a realistic model of the inner magnetosphere. We reproduce the topology of the reflected energy distribution in the equatorial plane by modeling discrete chorus elements generated at the equator. Our calculations show that the spatial spreading is large and strongly dependent upon initial wave parameters, especially the chorus wave frequency. Thus, the divergence of each element ray trajectories can result in the filling of a large region (about 4 Earth radii around the source) of the magnetosphere and a reflected intensity of 0.005–0.06 of the source signal in the equatorial plane. These results are in good agreement with previous Cluster and THEMIS observations.

scholarly journals Large-amplitude wave electric field in the inner magnetosphere during substorms

2008 ◽  
Vol 113 (A7) ◽  
pp. n/a-n/a ◽  
Author(s):  
Y. Nishimura ◽  
J. Wygant ◽  
T. Ono ◽  
M. Iizima ◽  
A. Kumamoto ◽  
...  
Keyword(s):  
Electric Field ◽  
Large Amplitude ◽  
Amplitude Wave ◽  
Inner Magnetosphere ◽  
Large Amplitude Wave
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