A Theoretical Study of X-ray produced by the Plasma Focus device based on Sing Lee model

The Lee code is applied to characterize the plasma focus in two plasma focus devices UNU/ICTP PFF and Amirkabir plasma focus device (APF), and for optimizing the nitrogen soft x-ray yields based on bank, tubes and operating parameters. It is found that the soft x-ray yield increases with changing pressure until it reaches the maximum value for each plasma focus device, with keeping the bank parameters, operational voltage unchanged but systematically changing other parameters.

Study of Magnetoacoustic solitons in ultra dense quantum electron-positron-ion plasma

In this search, it has been studied the properties of the magnetoacoustic soliton waves in ultra dense quantum plasma and its including ions and electrons and positrons after taking quantum effects of electrons and positrons into consideration due to their Fermionic nature and the quantum diffraction, this is by the quantum Bom potential into two momentum equations of electrons and positrons . It has been studied the solitary waves of small amplitude by using reductive perturbation method. The results have been compared to the solitary waves ones with what others have reached in related references.

Numerical study of soft x-ray yield in two dense plasma focus devices based on Lee code, and comparing it with experimental results using neon filling gas

In this work we carried out some numerical experiments on NX2, UNU/ICTP PFF dense plasma focus device with neon filling gas using Lee code version (RADPFV5.15de.c1) and standard parameters of the devices to compare the value of the soft x-ray yield (Ysxr) emitting from each one. Also we studied the influence some factors on the value of (Ysxr).

Instabilities in Electron Beam in a Dense Warm Inhomogeneous Plasma

We investigate the influence of the variable plasma density on the spatial growth of the beam-plasma instability, considering the model of homogeneous cold beam-inhomogeneous warm plasma system under the condition of the smallness of phase velocity of waves compared to the beam velocity. We determine a direction of the beam with unmagnatized plasma. Considering a one – dimensional electrostatic oscillation when the directions of beam propagation, plasma density gradient and wave electric field coincide with X-axis. To formulate mathematical equation of beam and plasma then we make studying equation linearized, and then study the continuity equation and boundary conditions. Formulating electric field density then study a case in which a plasma is collisional because of its high density and the temperature .Finally we drive absorbent energy and find solutions of these equations then draw it.