scholarly journals First results of low frequency electromagnetic wave detector of TC-2/Double Star program

2005 ◽  
Vol 23 (8) ◽  
pp. 2803-2811 ◽  
Author(s):  
J. B. Cao ◽  
Z. X. Liu ◽  
J. Y. Yang ◽  
C. X. Yian ◽  
Z. G. Wang ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Southern Hemisphere ◽  
Northern Hemisphere ◽  
Geomagnetic Storms ◽  
Low Frequency ◽  
Wave Detector ◽  
Ion Cyclotron Waves ◽  
Satellite Platform ◽  
Ion Cyclotron ◽  
First Results

Abstract. LFEW is a low frequency electromagnetic wave detector mounted on TC-2, which can measure the magnetic fluctuation of low frequency electromagnetic waves. The frequency range is 8 Hz to 10 kHz. LFEW comprises a boom-mounted, three-axis search coil magnetometer, a preamplifier and an electronics box that houses a Digital Spectrum Analyzer. LFEW was calibrated at Chambon-la-Forêt in France. The ground calibration results show that the performance of LFEW is similar to that of STAFF on TC-1. The first results of LFEW show that it works normally on board, and that the AC magnetic interference of the satellite platform is very small. In the plasmasphere, LFEW observed the ion cyclotron waves. During the geomagnetic storm on 8 November 2004, LFEW observed a wave burst associated with the oxygen ion cyclotron waves. This observation shows that during geomagnetic storms, the oxygen ions are very active in the inner magnetosphere. Outside the plasmasphere, LFEW observed the chorus on 3 November 2004. LFEW also observed the plasmaspheric hiss and mid-latitude hiss both in the Southern Hemisphere and Northern Hemisphere on 8 November 2004. The hiss in the Southern Hemisphere may be the reflected waves of the hiss in the Northern Hemisphere.

Nonlinear behaviour of a finite amplitude electron plasma wave - IV. Decay to ion cyclotron waves

1978 ◽  
Vol 363 (1715) ◽  
pp. 547-557
Keyword(s):  
Magnetic Field ◽  
Low Frequency ◽  
Electron Plasma ◽  
Finite Amplitude ◽  
Nonlinear Behaviour ◽  
Electron Plasma Wave ◽  
Ion Cyclotron Waves ◽  
Ion Cyclotron ◽  
Low Frequency Mode ◽  
The Magnetic Field

Plasma in a magnetic field displays low frequency modes near the ion cyclotron frequency for waves propagating at an angle to the magnetic field. These modes are only slightly modified in a bounded plasma, and therefore can be excited by nonlinear decay of electron plasma waves which also propagate at an angle to the magnetic field. The nonlinearly generated low frequency mode has been identified experimentally as an ion cyclotron wave by stimulating the decay. The resonant matching conditions have also been demonstrated.

Nonlinear interaction of electrostatic ion-cyclotron and drift waves in plasmas

1996 ◽  
Vol 56 (1) ◽  
pp. 187-191 ◽  
Author(s):  
O. A. Pokhotelov ◽  
L. Stenflo ◽  
P. K. Shukla
Keyword(s):  
Nonlinear Interaction ◽  
Ponderomotive Force ◽  
Modulational Instability ◽  
Low Frequency ◽  
Drift Waves ◽  
Nonlinear Coupling ◽  
Constant Amplitude ◽  
Ion Cyclotron Waves ◽  
Ion Cyclotron ◽  
Model Equations

Model equations describing the nonlinear coupling between electrostatic ion-cyclotron and drift waves are derived, taking into account the action of the low-frequency ponderomotive force associated with the ion-cyclotron waves. It is found that this interaction is governed by a pair of equations, which can be used for studying the modulational instability of a constant amplitude ion-cyclotron wave as well as the dynamics of nonlinearly coupled ion-cyclotron and drift waves.

Excitation of the Low Frequency Slow Alfvén Waves Associated With the Alfvén Ion Cyclotron Waves in the Gamma 10 Tandem Mirror

2003 ◽  
Vol 43 (1T) ◽  
pp. 213-215
Author(s):  
H. Higaki ◽  
M. Ichimura ◽  
K. Kadoya ◽  
S. Saosaki ◽  
H. Kano ◽  
...  
Keyword(s):  
Low Frequency ◽  
Alfven Waves ◽  
Alfvén Waves ◽  
Tandem Mirror ◽  
Ion Cyclotron Waves ◽  
Ion Cyclotron

scholarly journals Ion cyclotron waves in the Earth’s magnetotail during CASSINI’s Earth swing-by

2003 ◽  
Vol 21 (10) ◽  
pp. 2043-2057 ◽  
Author(s):  
A. T. Bogdanov ◽  
K.-H. Glassmeier ◽  
G. Musmann ◽  
M. K. Dougherty ◽  
S. Kellock ◽  
...  
Keyword(s):  
Observation Interval ◽  
Low Frequency ◽  
Plasma Waves ◽  
Heavy Ion ◽  
Ion Cyclotron Waves ◽  
Ion Cyclotron ◽  
Solar Wind Origin ◽  
The Waves ◽  
Proton Cyclotron ◽  
Linear Polarisation

Abstract. The properties of low frequency magnetotail waves observed during CASSINI’s Earth swing-by are examined. A maximum in the distribution of the waves about half the proton cyclotron frequency and a peak at linear polarisation are found and their implications are analysed in detail. Data on the fluid plasma velocity for the observation interval are not available and thus no unique conclusions about Doppler shift influence on the properties of the waves can be made. This determines the need to analyse different hypotheses in order to understand the origin of the waves. The plausibility of competing interpretations, such as off-resonance proton cyclotron waves and bi-ion cyclotron waves at the gyrofrequency of a heavy ion component of the magneto-tail plasma in the form of He ++ ions of solar wind origin is questioned.Key words. Space plasma physics (waves and instabilities) – Magnetospheric physics (plasma waves and instabilities; magnetotail)

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