Jovian magnetospheric ion cyclotron instability in the presence of parallel electric field

1993 ◽  
Vol 60 (3) ◽  
pp. 211-224
Author(s):  
M. M. Ahmad ◽  
Altaf Ahmad
Keyword(s):  
Electric Field ◽  
Parallel Electric Field ◽  
Cyclotron Instability ◽  
Ion Cyclotron

THE ELECTROMAGNETIC ION-CYCLOTRON INSTABILITY IN THE PRESENCE OF A.C. ELECTRIC FIELD FOR LORENTZIAN KAPPA

2008 ◽  
Vol 1 ◽  
pp. 207-217 ◽  
Author(s):  
Rama Shankar Pandey ◽  
R. P. Pandey ◽  
Ajay K. Srivastava ◽  
S. Md. Karim ◽  
Anonymous Hariom
Keyword(s):  
Electric Field ◽  
Cyclotron Instability ◽  
Ion Cyclotron

scholarly journals Diagnosing collisionless energy transfer using field–particle correlations: Alfvén-ion cyclotron turbulence

2020 ◽  
Vol 86 (4) ◽  
Author(s):  
Kristopher G. Klein ◽  
Gregory G. Howes ◽  
Jason M. TenBarge ◽  
Francesco Valentini
Keyword(s):  
Energy Transfer ◽  
Electric Field ◽  
Transfer Rate ◽  
Velocity Space ◽  
Turbulence Energy ◽  
Correlation Technique ◽  
Parallel Electric Field ◽  
Particle Correlation ◽  
Particle Correlations ◽  
Ion Cyclotron

We apply field–particle correlations – a technique that tracks the time-averaged velocity-space structure of the energy density transfer rate between electromagnetic fields and plasma particles – to data drawn from a hybrid Vlasov–Maxwell simulation of Alfvén-ion cyclotron turbulence. Energy transfer in this system is expected to include both Landau and cyclotron wave–particle resonances, unlike previous systems to which the field–particle correlation technique has been applied. In this simulation, the energy transfer rate mediated by the parallel electric field $E_{\Vert }$ comprises approximately 60 % of the total rate, with the remainder mediated by the perpendicular electric field $E_{\bot }$ . The parallel electric field resonantly couples to protons, with the canonical bipolar velocity-space signature of Landau damping identified at many points throughout the simulation. The energy transfer mediated by $E_{\bot }$ preferentially couples to particles with $v_{tp}\lesssim v_{\bot }\lesssim 3v_{tp}$ , where $v_{tp}$ is the proton thermal speed, in agreement with the expected formation of a cyclotron diffusion plateau. Our results demonstrate clearly that the field–particle correlation technique can distinguish distinct channels of energy transfer using single-point measurements, even at points in which multiple channels act simultaneously, and can be used to determine quantitatively the rates of particle energization in each channel.

VELOCITY SHEAR ION-CYCLOTRON INSTABILITY WITH PERPENDICULAR AC ELECTRIC FIELD

2008 ◽  
Vol 3 ◽  
pp. 177-191 ◽  
Author(s):  
Rama Shankar Pandey ◽  
Umesh Chandra Srivastava ◽  
R. P. Pandey ◽  
B. B. Prasad ◽  
Anonymous Hariom
Keyword(s):  
Electric Field ◽  
Velocity Shear ◽  
Ac Electric Field ◽  
Cyclotron Instability ◽  
Ion Cyclotron

scholarly journals Electromagnetic ion-cyclotron instability in the presence of a parallel electric field with general loss-cone distribution function - particle aspect analysis

2006 ◽  
Vol 24 (7) ◽  
pp. 1919-1930 ◽  
Author(s):  
G. Ahirwar ◽  
P. Varma ◽  
M. S. Tiwari
Keyword(s):  
Growth Rate ◽  
Distribution Function ◽  
Electric Field ◽  
General Distribution ◽  
Marginal Stability ◽  
Parallel Electric Field ◽  
Loss Cone ◽  
Emic Wave ◽  
Ion Cyclotron ◽  
Particle Aspect Analysis

Abstract. The effect of parallel electric field on the growth rate, parallel and perpendicular resonant energy and marginal stability of the electromagnetic ion-cyclotron (EMIC) wave with general loss-cone distribution function in a low β homogeneous plasma is investigated by particle aspect approach. The effect of the steepness of the loss-cone distribution is investigated on the electromagnetic ion-cyclotron wave. The whole plasma is considered to consist of resonant and non-resonant particles. It is assumed that resonant particles participate in the energy exchange with the wave, whereas non-resonant particles support the oscillatory motion of the wave. The wave is assumed to propagate parallel to the static magnetic field. The effect of the parallel electric field with the general distribution function is to control the growth rate of the EMIC waves, whereas the effect of steep loss-cone distribution is to enhance the growth rate and perpendicular heating of the ions. This study is relevant to the analysis of ion conics in the presence of an EMIC wave in the auroral acceleration region of the Earth's magnetoplasma.

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