Model of auroral electron acceleration by dissipative nonlinear inertial Alfvén wave

2004 ◽  
Vol 109 (A6) ◽  
Author(s):  
D. J. Wu
Keyword(s):  
Electron Acceleration ◽  
Alfven Wave ◽  
Inertial Alfvén Wave ◽  
Auroral Electron

The nonlinear interaction of the whistler wave with the inertial alfven wave in the magnetosphere of the Earth

2002 ◽  
Vol 8 (5-6) ◽  
pp. 96-101
Author(s):  
V.N. Fedun ◽  
◽  
A.K. Yukhimuk ◽  
A.D. Voitsekhovska ◽  
О.К. Cheremnykh ◽  
...  
Keyword(s):  
Nonlinear Interaction ◽  
Whistler Wave ◽  
Alfven Wave ◽  
Inertial Alfvén Wave ◽  
The Earth

scholarly journals Field Localization and Density Cavitation in Low-Beta Plasmas

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Motilal Rinawa ◽  
Prashant Chauhan ◽  
Sintu Kumar ◽  
Manoj Kumar Singh ◽  
Hari Kumar Singh ◽  
...  
Keyword(s):  
Ponderomotive Force ◽  
Space Plasma ◽  
Density Fluctuations ◽  
Alfven Wave ◽  
Nonlinear Coupling ◽  
Auroral Region ◽  
Filamentous Structure ◽  
Inertial Alfvén Wave ◽  
Turbulent Spectrum ◽  
Field Localization

In the present paper, filamentous structure formation, associated turbulent spectrum, and density cavity formation phenomena have been investigated for low- β plasma β ≪ m e / m i applicable to the auroral region. A set of dimensionless equations governing the dynamics of three dimensionally propagating inertial Alfvén wave (3D-IAW) and perpendicularly propagating magnetosonic wave (PMSW) has been developed. Ponderomotive force due to 3D-IAW has been included in the dynamics of the PMSW. Numerical simulation has been performed to study the nonlinear coupling of these two waves. From the obtained results, we found that the field intensity localization takes place which may further lead to the additional dissipation/turbulence process for particle heating and acceleration in space plasma. The associated turbulent spectrum is obtained with scaling nearly k − 4.28 at smaller scales (in the dissipation range). Relevance of the obtained results with the observations reported by various spacecrafts such as Hawkeye and Heos 2 has been discussed. Also, density fluctuations (depletion) of ∼ 0.10   n 0 are calculated, which are consistent with the FAST spacecraft observation reported.

scholarly journals High- and low-altitude observations of adiabatic parameters associated with auroral electron acceleration

2000 ◽  
Vol 105 (A2) ◽  
pp. 2541-2550 ◽  
Author(s):  
K. Shiokawa ◽  
W. Baumjohann ◽  
G. Haerendel ◽  
H. Fukunishi
Keyword(s):  
Electron Acceleration ◽  
Auroral Electron ◽  
Low Altitude

scholarly journals Alfvén resonance absorption in electron-positron plasmas

2010 ◽  
Vol 6 (S274) ◽  
pp. 224-227 ◽  
Author(s):  
N. F. Cramer
Keyword(s):  
Mode Conversion ◽  
Alfven Wave ◽  
Pulsar Magnetosphere ◽  
Pulsar Radio ◽  
Inertial Alfvén Wave ◽  
Pair Plasma ◽  
Electron Positron ◽  
Normal Electron ◽  
The Magnetic Field ◽  
Pulsar Radio Emission

AbstractWaves propagating obliquely in a magnetized cold pair plasma experience an approximate resonance in the wavevector component perpendicular to the magnetic field, which is the analogue of the Alfvén resonance in normal electron-ion plasmas. Wave absorption at the resonance can take place via mode conversion to the analogue of the short wavelength inertial Alfvén wave. The Alfvén resonance could play a role in wave propagation in the pulsar magnetosphere leading to pulsar radio emission. Ducting of waves in strong plasma gradients may occur in the pulsar magnetosphere, which leads to the consideration of Alfvén surface waves, whose energy is concentrated in the region of strong gradients.

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