Dust-ion-acoustic solitons in plasmas with non-Maxwellian electron distribution function

2008 ◽  
Vol 15 (10) ◽  
pp. 103705 ◽  
Author(s):  
H. Hakimi Pajouh ◽  
H. Abbasi
Keyword(s):  
Distribution Function ◽  
Electron Distribution ◽  
Electron Distribution Function ◽  
Ion Acoustic ◽  
Ion Acoustic Solitons

Electrostatic heat flux instabilities

1978 ◽  
Vol 20 (1) ◽  
pp. 47-60 ◽  
Author(s):  
S. Peter Gary
Keyword(s):  
Heat Flux ◽  
Distribution Function ◽  
Electron Beam ◽  
Electron Distribution ◽  
Electron Distribution Function ◽  
High Energy ◽  
Electrostatic Waves ◽  
High Energy Tail ◽  
Ion Acoustic ◽  
Ion Cyclotron

The linear Vlasov dispersion relation for electrostatic waves in a homogeneous plasma is studied for instabilities driven by an electron heat flux. A two Maxwellian model of the electron distribution function gives rise to three unstable modes: the electron beam, ion-acoustic and ion cyclotron heat flux instabilities. At large Te/Ti the ion-acoustic instability has the lowest threshold; at small Te/Ti the electron beam instability is dominant; and at intermediate values of Te/Ti the ion cyclotron mode is the first to go unstable. The presence of a high energy tail on the electron distribution function raises the value of the dimensionless heat flux qe/(nemev3e) at the ion-acoustic threshold, but increasing atomic number of the ions decreases this value.

Non-Maxwellian shape of electron distribution function in ion acoustic turbulence

2001 ◽  
Vol 29 (6) ◽  
pp. 907-910
Author(s):  
E. Farshi ◽  
T. Fukuyama ◽  
M. Matsukuma ◽  
Y. Kawai
Keyword(s):  
Distribution Function ◽  
Electron Distribution ◽  
Electron Distribution Function ◽  
Ion Acoustic
Sign in / Sign up

Export Citation Format

Share Document