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Article
Generation of Highly-Directed Laser-Driven Plasma Blocks for Light Ion Beam Fusion Applications

Authors: H. Hora --- F. Osman --- Y.L. Cang
Journal: Iraqi Journal of Applied Physics المجلة العراقية للفيزياء التطبيقية ISSN: 18132065 23091673 Year: 2010 Volume: 6 Issue: 1 Pages: 3-13
Publisher: iraqi society for alternative and renewable energy sources and techniques الجمعية العراقية لمصادر وتقنيات الطاقة البديلة والمستجدة

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Abstract

It is being clarified why the observations of plane wave geometry interaction within the skin depth of a laser irradiated target are very unique exceptions from the broad stream of the usual experiments of laser plasma interaction. This permits a much more simplified description by plane wave interaction theory for laser pulses of about ps or shorter duration and powers above TW and simplifies computations in contrast to the usual cases with relativistic self-focusing. After establishing theoretically and experimentally the generation of highly directed plasma blocks with ion current densities above 1010A/cm2 moving against the laser light or into the target, applications for laser fusion, and a completely new improvement of ion sources for the next generation of accelerators are discussed.


Article
Effect of Transverse Magnetic Field on Laser Beam Width Parameter

Author: R.A. Khamis
Journal: Iraqi Journal of Applied Physics المجلة العراقية للفيزياء التطبيقية ISSN: 18132065 23091673 Year: 2012 Volume: 8 Issue: 3 Pages: 31-34
Publisher: iraqi society for alternative and renewable energy sources and techniques الجمعية العراقية لمصادر وتقنيات الطاقة البديلة والمستجدة

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Abstract

In this work, the variation of plasma and cyclotronic frequencies on nonlinear permittivity 2 has been studied. Two equations of second order has been solved numerically using Runge-Kutta method. Decreasing the minimum beam width parameter is an important issue in some applications such as laser ignitor fusion, laser acceleration and harmonic generation. The effect of applying of magnetic field has been analyzed through the variation of minimum beam width parameter as a function of the cyclotronic frequency. The effect of magnetized plasma is to decrease f0 until it reaches its minimum point then after that point diffraction term becomes dominant.

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