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Parametric Instability of an X-mode laser off a lower hybrid wave

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Abstract

A high-frequency X-mode laser is susceptible to parametric decay into a lower hybrid wave and a sideband X-mode laser in magnetized plasma. The electron density perturbation associated with the lower hybrid wave couples with the oscillatory velocity due to the pump to produce a nonlinear current, driving the sideband. The pump and the sideband X-mode laser exert a low-frequency ponderomotive force on electrons driving the lower hybrid wave. For typical parameters, \(eA_{0} /m\omega c = 0.1,\) \(\omega_{p} /\omega_{c} = 1,\) \(m_{i} /m = 4000\,,\) \(\omega_{pi} /\omega_{ci} = 25,\) \(\omega_{0} /\omega_{ci} = 100\) and \(k_{x} c/\omega = 0.1,\) the growth rate increases linearly with \(\omega /\omega_{LH}\).

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Acknowledgements

Mr. Sanjay Babu is thankful to University of Allahabad for providing D.Phil. fellowship for financial support and grateful to Prof. V. K. Tripathi for his valuable suggestion and fruitful discussion.

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Authors and Affiliations

  1. Plasma Physics Research Group, Department of Physics, Faculty of Science, University of Allahabad, Prayagraj, 211002, India

    Sanjay Babu, Ram Jeet, Arvind Kumar, Asheel Kumar & Ashish Varma

  2. Department of Physics, K. N. Govt. P. G. College Gyanpur, Bhadohi, 221304, India

    Ashish Varma

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  1. Sanjay Babu
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  2. Ram Jeet
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  3. Arvind Kumar
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  4. Asheel Kumar
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  5. Ashish Varma
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Correspondence to Ashish Varma.

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Babu, S., Jeet, R., Kumar, A. et al. Parametric Instability of an X-mode laser off a lower hybrid wave. Iran J Sci Technol Trans Sci 46, 1719–1726 (2022). https://doi.org/10.1007/s40995-022-01373-8

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  • DOI: https://doi.org/10.1007/s40995-022-01373-8

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