Cosmic‐Ray Pitch‐Angle Scattering through 90o

2001 ◽  
Vol 553 (1) ◽  
pp. 198-210 ◽  
Author(s):  
G. M. Felice ◽  
R. M. Kulsrud
Keyword(s):  
Pitch Angle ◽  
Cosmic Ray ◽  
Angle Scattering

scholarly journals COSMIC-RAY PITCH-ANGLE SCATTERING IN IMBALANCED MHD TURBULENCE SIMULATIONS

2015 ◽  
Vol 811 (1) ◽  
pp. 8 ◽  
Author(s):  
Martin S. Weidl ◽  
Frank Jenko ◽  
Bogdan Teaca ◽  
Reinhard Schlickeiser
Keyword(s):  
Pitch Angle ◽  
Cosmic Ray ◽  
Mhd Turbulence ◽  
Angle Scattering

Cosmic-ray pitch-angle scattering in isotropic turbulence

1988 ◽  
Vol 334 ◽  
pp. 470 ◽  
Author(s):  
John W. Bieber ◽  
Charles W. Smith ◽  
William H. Matthaeus
Keyword(s):  
Pitch Angle ◽  
Isotropic Turbulence ◽  
Cosmic Ray ◽  
Angle Scattering

scholarly journals Cosmic Ray Pitch Angle Scattering Through 90{degree}

2000 ◽  
Author(s):  
R.M. Kulsrud ◽  
G.M. Felice
Keyword(s):  
Pitch Angle ◽  
Cosmic Ray ◽  
Angle Scattering

Nongyroresonant Pitch Angle Scattering

1999 ◽  
Vol 518 (2) ◽  
pp. 974-984 ◽  
Author(s):  
B. R. Ragot
Keyword(s):  
Pitch Angle ◽  
Angle Scattering

scholarly journals Resonant scattering of energetic electrons in the plasmasphere by monotonic whistler-mode waves artificially generated by ionospheric modification

2014 ◽  
Vol 32 (5) ◽  
pp. 507-518 ◽  
Author(s):  
S. S. Chang ◽  
B. B. Ni ◽  
J. Bortnik ◽  
C. Zhou ◽  
Z. Y. Zhao ◽  
...  
Keyword(s):  
Test Particle ◽  
Pitch Angle ◽  
Low Frequency ◽  
Resonant Scattering ◽  
High Energy ◽  
Whistler Waves ◽  
Energetic Electrons ◽  
High Energy Electrons ◽  
Angle Scattering ◽  
Vlf Waves

Abstract. Modulated high-frequency (HF) heating of the ionosphere provides a feasible means of artificially generating extremely low-frequency (ELF)/very low-frequency (VLF) whistler waves, which can leak into the inner magnetosphere and contribute to resonant interactions with high-energy electrons in the plasmasphere. By ray tracing the magnetospheric propagation of ELF/VLF emissions artificially generated at low-invariant latitudes, we evaluate the relativistic electron resonant energies along the ray paths and show that propagating artificial ELF/VLF waves can resonate with electrons from ~ 100 keV to ~ 10 MeV. We further implement test particle simulations to investigate the effects of resonant scattering of energetic electrons due to triggered monotonic/single-frequency ELF/VLF waves. The results indicate that within the period of a resonance timescale, changes in electron pitch angle and kinetic energy are stochastic, and the overall effect is cumulative, that is, the changes averaged over all test electrons increase monotonically with time. The localized rates of wave-induced pitch-angle scattering and momentum diffusion in the plasmasphere are analyzed in detail for artificially generated ELF/VLF whistlers with an observable in situ amplitude of ~ 10 pT. While the local momentum diffusion of relativistic electrons is small, with a rate of < 10−7 s−1, the local pitch-angle scattering can be intense near the loss cone with a rate of ~ 10−4 s−1. Our investigation further supports the feasibility of artificial triggering of ELF/VLF whistler waves for removal of high-energy electrons at lower L shells within the plasmasphere. Moreover, our test particle simulation results show quantitatively good agreement with quasi-linear diffusion coefficients, confirming the applicability of both methods to evaluate the resonant diffusion effect of artificial generated ELF/VLF whistlers.

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