scholarly journals Interferometric identification of ion acoustic broadband waves in the auroral region: CLUSTER observations

2005 ◽  
Vol 32 (21) ◽  
Author(s):  
M. Backrud ◽  
A. Tjulin ◽  
A. Vaivads ◽  
M. André ◽  
A. Fazakerley
Keyword(s):  
Auroral Region ◽  
Ion Acoustic ◽  
Broadband Waves

scholarly journals Cluster observations and theoretical identification of broadband waves in the auroral region

2005 ◽  
Vol 23 (12) ◽  
pp. 3739-3752 ◽  
Author(s):  
M. Backrud-Ivgren ◽  
G. Stenberg ◽  
M. André ◽  
M. Morooka ◽  
Y. Hobara ◽  
...  
Keyword(s):  
Electric Field ◽  
Acoustic Waves ◽  
Auroral Region ◽  
Parallel Electric Field ◽  
Ion Acoustic Waves ◽  
Ion Cyclotron Waves ◽  
Linear Waves ◽  
Field Lines ◽  
Broadband Waves ◽  
The Waves

Abstract. Broadband waves are common on auroral field lines. We use two different methods to study the polarization of the waves at 10 to 180 Hz observed by the Cluster spacecraft at altitudes of about 4 Earth radii in the nightside auroral region. Observations of electric and magnetic wave fields, together with electron and ion data, are used as input to the methods. We find that much of the wave emissions are consistent with linear waves in homogeneous plasma. Observed waves with a large electric field perpendicular to the geomagnetic field are more common (electrostatic ion cyclotron waves), while ion acoustic waves with a large parallel electric field appear in smaller regions without suprathermal (tens of eV) plasma. The regions void of suprathermal plasma are interpreted as parallel potential drops of a few hundred volts.

Features of generation of broadband waves of the ion-cyclotron and the ion-acoustic type in the auroral ionosphere

2015 ◽  
Author(s):  
Alexander A. Chernyshov ◽  
Askar A. Ilysov ◽  
Mikhail M. Mogilevsky ◽  
Irina V. Golovchanskaya ◽  
Boris V. Kozelov
Keyword(s):  
Auroral Ionosphere ◽  
Ion Acoustic ◽  
Ion Cyclotron ◽  
Broadband Waves

Ion Acoustic Microscopy

1985 ◽  
Author(s):  
Keith O. Legg ◽  
Douglas N. Rose
Keyword(s):  
Acoustic Microscopy ◽  
Ion Acoustic

Solitary waves in a dusty adiabatic electronegative plasma

2010 ◽  
Vol 76 (3-4) ◽  
pp. 409-418 ◽  
Author(s):  
A. A. MAMUN ◽  
K. S. ASHRAFI ◽  
M. G. M. ANOWAR
Keyword(s):  
Solitary Waves ◽  
Vries Equation ◽  
Negative Ions ◽  
Finite Amplitude ◽  
Reductive Perturbation Method ◽  
Charged Dust ◽  
Electronegative Plasma ◽  
Ion Acoustic ◽  
Basic Features ◽  
Electronegative Plasmas

AbstractThe dust ion-acoustic solitary waves (SWs) in an unmagnetized dusty adiabatic electronegative plasma containing inertialess adiabatic electrons, inertial single charged adiabatic positive and negative ions, and stationary arbitrarily (positively and negatively) charged dust have been theoretically studied. The reductive perturbation method has been employed to derive the Korteweg-de Vries equation which admits an SW solution. The combined effects of the adiabaticity of plasma particles, inertia of positive or negative ions, and presence of positively or negatively charged dust, which are found to significantly modify the basic features of small but finite-amplitude dust-ion-acoustic SWs, are explicitly examined. The implications of our results in space and laboratory dusty electronegative plasmas are briefly discussed.

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