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Excitation of ion acoustic waves by self-focused q-Gaussian laser beam in plasma with axial density ramp

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Abstract

Dynamics of the laser-driven ion acoustic waves (IAWs) in plasmas with axial density ramp has been investigated theoretically. The effect of self-focusing of the laser beam on the power of laser excited IAW has been incorporated. During its propagation through the plasma, the laser beam excites an IAW at frequency \(\omega_{{\rm ia}}\) that due to the optical nonlinearity of plasma gets nonlinearly coupled to the laser beam. Using variational theory, semianalytical solutions of the coupled nonlinear wave equations for the pump wave and IAW have been obtained under W.K.B approximation technique. It has been observed that power of the IAW is significantly affected by the self-focusing effect of pump beam.

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Authors and Affiliations

  1. Lovely Professional University, Phagwara, India

    Naveen Gupta, Suman Choudhry & Sanjeev Kumar

  2. Government College for Women, Karnal, India

    Suman Choudhry & Sanjeev Kumar

  3. SUS Govt College, Matak-Majri, Indri, Karnal, India

    S. B. Bhardwaj

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  1. Naveen Gupta
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  2. Suman Choudhry
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  3. S. B. Bhardwaj
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  4. Sanjeev Kumar
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Correspondence to Naveen Gupta.

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Gupta, N., Choudhry, S., Bhardwaj, S.B. et al. Excitation of ion acoustic waves by self-focused q-Gaussian laser beam in plasma with axial density ramp. J Opt 52, 269–280 (2023). https://doi.org/10.1007/s12596-022-00873-5

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  • DOI: https://doi.org/10.1007/s12596-022-00873-5

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