Role of magnetic shear on the electrostatic current driven ion-cyclotron instability in the presence of parallel electric field

Pramana ◽  
2001 ◽  
Vol 56 (6) ◽  
pp. 779-784 ◽  
Author(s):  
Harsha Jalori ◽  
AK Gwal
Keyword(s):  
Electric Field ◽  
Parallel Electric Field ◽  
Magnetic Shear ◽  
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

Confinement in W7-AS and the role of radial electric field and magnetic shear

1997 ◽  
Vol 39 (12B) ◽  
pp. B273-B286 ◽  
Author(s):  
R Brakel ◽  
M Anton ◽  
J Baldzuhn ◽  
R Burhenn ◽  
V Erckmann ◽  
...  
Keyword(s):  
Electric Field ◽  
Radial Electric Field ◽  
Magnetic Shear

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.

Influence of magnetic shear on the collisional current driven ion cyclotron instability

1984 ◽  
Vol 26 (11) ◽  
pp. 1333-1342
Author(s):  
P Satyanarayana ◽  
G Ganguli ◽  
S L Ossakow
Keyword(s):  
Magnetic Shear ◽  
Cyclotron Instability ◽  
Ion Cyclotron
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