Open AccessInstability Growth Rate Dependence on Input Parameters During the Beam–Target Plasma Interaction
Author(s) -
Miroslav Horký
Publication year - 2013
Publication title -
acta polytechnica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.207
H-Index - 15
eISSN - 1805-2363
pISSN - 1210-2709
DOI - 10.14311/1751
Subject(s) - instability , dispersion relation , physics , plasma , thermalisation , magnetic field , two stream instability , growth rate , quantum electrodynamics , turbulence , radius , atomic physics , mechanics , computational physics , condensed matter physics , mathematics , quantum mechanics , geometry , computer security , computer science
The two-stream instability without magnetic field is described by the well-known Buneman dispersion relation. For more complicated situations we need to use the Generalized Buneman Dispersion Relation derived by Kulhánek, Bren, and Bohata in 2011, which is a polynomial equation of 8th order. The maximal value of the imaginary part of the individual dispersion branches ?n(k) is very interesting from the physical point of view. It represents the instability growth rate which is responsible for the turbulence mode onset and subsequent reconnection on the ion radius scale accompanied by strong plasma thermalization. The paper presented here is focused on the instability growth rate dependence on various input parameters, such as magnitude of a magnetic field and sound velocity. The results are presented in well-arranged plots and can be used for a survey of the plasma parameters close to which the strong energy transfer and thermalization between the beam and the target occurs.