Effect of parallel electric field on electron cyclotron waves in Saturn’s magnetospheric plasma

2020 ◽  
Author(s):  
G. Ahirwar ◽  
Amar Singh Patneshwar
Keyword(s):  
Electric Field ◽  
Electron Cyclotron ◽  
Magnetospheric Plasma ◽  
Parallel Electric Field ◽  
Electron Cyclotron Waves

scholarly journals Electron cyclotron waves in the presence of parallel electric fields in the Earth's auroral plasma

1997 ◽  
Vol 15 (1) ◽  
pp. 24-28 ◽  
Author(s):  
S. Kumar ◽  
S. K. Dixit ◽  
A. K. Gwal
Keyword(s):  
Growth Rate ◽  
Electric Field ◽  
Electric Fields ◽  
Electron Cyclotron ◽  
Wave Excitation ◽  
Parallel Electric Field ◽  
Excitation Process ◽  
Auroral Plasma ◽  
Auroral Electrons ◽  
Electron Cyclotron Waves

Abstract. The electron cyclotron waves that originate at low altitudes (<0.5 RE) and observed by ground facilities have been studied in the presence of a weak parallel electric field in auroral magnetoplasma consisting of trapped energetic auroral electrons and cold background electrons of ionospheric origin. The model distribution for auroral trapped electrons is taken as Maxwellian ring distribution. An expression for the growth rate has been obtained in the presence of parallel electric field assuming that the real frequency in the whistler mode is not affected by the presence of the electric field. The results show that waves grow (or damp) in amplitude for a parallel (or antiparallel) electric field. The influence of the electric field is more pronounced at a shorter wavelength spectrum. An increase in population of energetic electrons increases the growth rate and thus, plays a significant role in the wave excitation process in the auroral regions.

Toroidal and electric field effects on current drive in tokamaks by lower hybrid and electron cyclotron waves

1988 ◽  
Vol 28 (2) ◽  
pp. 267-283 ◽  
Author(s):  
Yu.N. Dnestrovskij ◽  
D.P. Kostomarov ◽  
A.A. Lukyanitsa ◽  
V.V. Parail ◽  
A.P. Smirnov
Keyword(s):  
Electric Field ◽  
Electron Cyclotron ◽  
Current Drive ◽  
Lower Hybrid ◽  
Electric Field Effects ◽  
Field Effects ◽  
Electron Cyclotron Waves

Suppression of runaway electrons during electron cyclotron resonance heating on HL-2A tokamak

2009 ◽  
Vol 76 (1) ◽  
pp. 75-85 ◽  
Author(s):  
JIN-WEI YANG ◽  
YI-PO ZHANG ◽  
XU LI ◽  
XIAN-YING SONG ◽  
GUO-LIANG YUAN ◽  
...  
Keyword(s):  
Electric Field ◽  
Cyclotron Resonance ◽  
Electron Cyclotron Resonance ◽  
Resonant Interaction ◽  
Electron Cyclotron ◽  
Electron Cyclotron Resonance Heating ◽  
Runaway Electrons ◽  
Long Duration ◽  
Cross Correlation Analysis ◽  
Electron Cyclotron Waves

AbstractThe statistical analysis of heating effect and the cross-correlation analysis of both electron temperature and loop voltage have been done during electron cyclotron resonance heating (ECRH). The behavior of runaway electrons in the flat-top phase during ECRH are analyzed using experimental data. It is shown that the runaway population is indeed suppressed or even quenched when the toroidal electric field ET is reduced below the threshold electric field Eth by high-power and long-duration ECRH. The physical mechanism of runaway suppression is explored by the resonant interaction between the electron cyclotron waves and the energetic runaway electrons.

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