scholarly journals Map model for nonlinear alpha particle interaction with toroidal Alfven waves

1992 ◽  
Author(s):  
H.L. Berk ◽  
B.N. Breizman ◽  
H. Ye
Keyword(s):  
Alpha Particle ◽  
Particle Interaction ◽  
Alfven Waves ◽  
Alfvén Waves

scholarly journals Map model for nonlinear alpha particle interaction with toroidal Alfvén waves

1993 ◽  
Vol 5 (5) ◽  
pp. 1506-1515 ◽  
Author(s):  
H. L. Berk ◽  
B. N. Breizman ◽  
Huanchun Ye
Keyword(s):  
Alpha Particle ◽  
Particle Interaction ◽  
Alfven Waves ◽  
Alfvén Waves

Solar coronal heating by Alfvén waves in bi-kappa distributed plasma

2019 ◽  
Vol 491 (2) ◽  
pp. 2403-2412 ◽  
Author(s):  
Imran A Khan ◽  
Z Iqbal ◽  
G Murtaza
Keyword(s):  
Distribution Function ◽  
Velocity Distribution ◽  
Particle Interaction ◽  
Velocity Distribution Function ◽  
Alfven Waves ◽  
Coronal Heating ◽  
Alfvén Waves ◽  
Heating Process ◽  
Thermal Features ◽  
Inertial Alfvén Waves

ABSTRACT In solar physics, there is a decades-old conundrum that is still unsolved. Why is the temperature of the corona so much larger than that of the surface of the Sun? To solve this, various approaches have been adopted so far, but they have certain limitations. In the present analysis, we invoke the standard Vlasov model and the steady-state Poynting theorem to unlock the mysterious coronal heating mechanism in terms of inertial and kinetic Alfvén waves whose electromagnetic energies turn into heat during wave–particle interaction. The coronal plasmas that support these waves are modelled by a non-thermal bi-kappa velocity distribution function. The non-thermal distribution function, which is assumed to pre-exist in the system, strongly influences the wave-heating process. Particularly, during heating by the waves in the inertial limit, the non-thermal features of the distribution function give rise to a unique competition (which is entirely absent in the usual Maxwellian plasmas) between waves of different perpendicular wavenumbers (kx). For small kx, when either the non-thermal parameter κ or the electron parallel temperature T||e increases, the inertial Alfvén waves can efficiently heat the plasma in their immediate vicinity. However, for relatively large kx, an increase in either κ or T||e enables the inertial Alfvén waves to effectively heat the plasma in remote regions in the corona. Although such competition is not seen in the kinetic limit, the non-thermal features still seem to control the heating process. The possible explanations behind the above-mentioned cases are provided by the bi-kappa velocity distribution function, which holds vital clues as to how the non-thermal features, together with kx, dictate the resonance conditions that play a crucial role in the heating process.

scholarly journals Wave‐Particle Interaction of Alfvén Waves in Jupiter's Magnetosphere: Auroral and Magnetospheric Particle Acceleration

2018 ◽  
Vol 123 (11) ◽  
pp. 9560-9573 ◽  
Author(s):  
Joachim Saur ◽  
Sascha Janser ◽  
Anne Schreiner ◽  
George Clark ◽  
Barry H. Mauk ◽  
...  
Keyword(s):  
Particle Acceleration ◽  
Particle Interaction ◽  
Alfven Waves ◽  
Alfvén Waves ◽  
Wave Particle Interaction

scholarly journals Excitation of poloidal standing Alfvén waves through drift resonance wave-particle interaction

2013 ◽  
Vol 40 (16) ◽  
pp. 4127-4132 ◽  
Author(s):  
Lei Dai ◽  
Kazue Takahashi ◽  
John R. Wygant ◽  
Liu Chen ◽  
John Bonnell ◽  
...  
Keyword(s):  
Particle Interaction ◽  
Alfven Waves ◽  
Alfvén Waves ◽  
Wave Particle Interaction ◽  
Resonance Wave

scholarly journals On the origin of solar wind. Alfvén waves induced jump of coronal temperature

2007 ◽  
Vol 44 (3) ◽  
pp. 533-536 ◽  
Author(s):  
T. M. Mishonov ◽  
M. V. Stoev ◽  
Y. G. Maneva
Keyword(s):  
Solar Wind ◽  
Alfven Waves ◽  
Alfvén Waves ◽  
Coronal Temperature
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