The effect of plasma channel on the self-distortion of laser pulse propagating through the collisional plasma channel |
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| Institution: | 1. Guru Nanak Dev University College, Kapurthala, Punjab, India;2. National Institute of Technology Jalandhar, India;1. China Satellite Maritime Tracking and Control Department, Jiangyin, 214431, China;2. The Key Laboratory, Academy of Equipment, Beijing, 101416, China;3. School of Information System & Management, National University of Defense Technology, Changsha, 410073, China;1. Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei 230031, China;2. General Atomics, P.O. Box 85608, San Diego, CA 92186, USA;3. Lawrence Livermore National Laboratory, Livermore, CA 94550, USA;1. Max Planck Institute for the Physics of Complex Systems, Dresden, Germany;2. Abdus Salam International Centre for Theoretical Physics, Trieste, Italy;3. Department of Physics, Faculty of Sciences, University Ibnou Zohr, Agadir, Morocco;4. LPHE-Modeling and Simulation, Faculty of Sciences, Rabat, Morocco;5. Centre of Physics and Mathematics, Rabat, Morocco |
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| Abstract: | In the present paper, laser pulse distortion/breakup and the effect of the plasma channel on the laser propagation through the collisional plasma have been studied by using moment theory approach. Second order nonlinear differential equations of the beam width parameter have been derived for the propagation of the laser through uniform homogenous plasma and preformed plasma channel having parabolic density profile. Differential equations of beam width parameter have been solved numerically using Runge Kutta method. It has been observed from analysis that when the laser pulse propagates through the homogenous plasma, the low intensity front and rear parts of the laser get defocused/diffracted and the high intensity central/main portion of the laser pulse gets self-guided. As a result of this, the laser pulse gets distorted. This distortion of the laser has not been observed when the laser pulse is propagated through the plasma channel having density minimum at the axis and maximum at the edges. The laser pulse is guided as a whole, even the low intensity front and rear parts of the laser are also guided. Therefore, the plasma channel is useful to prevent the distortion/breakup of the laser. |
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| Keywords: | Plasma channel Self distortion Moment theory |
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