Non-quasi-neutral Plasmas or Chasmas
Chasmas are a generalization of plasmas, I.e., the condition of quasi-neutrality is dropped. In an accompagnying paper 13 the chasma equilibria were investigated and a shielding length for chasmas was introduced which generalizes the Debye length:λ2D=∈kBT=(n_+n+)e2. However, two other relevant quantities occurred in the equilibrium analysis: the chasma angular frequency:w2c=｜n_-n+｜e2／∈m_, and the associated length representing the distance over which a chasma may roughly have constant densities:λ2c=2∈kBT／｜n_-n+｜e2, where the difference of the densities occurs in contrast to the plasma frequency and the Debye length, but satisfying (λDwp)2≈(λcwc)2≈kBT／m_.Now the perturbation of these chasma equilibria is investigated. In the case that the densities are roughly constant we obtain the dispersion relation which generalizes the one for plasmas, involving the plasma and the chasma frequencies. Previous studies for the stability of a steady state chasma gave not the same results so that further improvement of both cases is desirable.
D.K.Callebaut
Physics Department,CGB,University of Antwerp,Antwerp,B-2020,Belgium
国际会议
Progress in Electromagnetics Research Symposium 2008(2008年电磁学研究新进展学术研讨会)(PIERS 2008)
杭州
英文
1-4
2008-03-24（万方平台首次上网日期，不代表论文的发表时间）