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|Title||A Model of Drift Waves Modified By Electron Temperature Gradients and ExB Rotation in Cylindrical Magnetized Plasma|
A general investigation of linear drift-waves phenomena in cylindrically bounded plasmas, immersed in a magnetic field without sheared and curvature, is described by the two-fluid equations, taking into account: (a) electron-temperature oscillation, (b)the radial variation of density and temperature, (c)the radial electric field ; and rotation, as well as (d)the electron motion parallel to the magnetic field lines. For plasmas in which the electron temperature strongly exceeds the ion temperature the problem is reduced to an ordinary complex second- order differential equation describes the radial distribution of the oscillating electric potential. It is shown that the presence of the rotation and the radial gradients in the undisturbed electron temperature leads to an important modification of the theory of drift waves in cylindrical plasma compared with previous models in which these phenomena were disregarded. The theory is applied to an experimental data of helium plasma using Runge-Kutta integration method. Our calculation shows that the temperature variation and the rotation are important in the predictions of drift wave frequency and radial position of the maximum wave amplitude.
|Publisher||the islamic university|
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