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Microwave energy channeling in plasma waveguides created by a high-power UV laser in the atmosphere

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Abstract

The grazing mode of microwave propagation in a hollow plasma waveguide formed by ionization of atmospheric air with a small easily ionized additive by strong UV pulses of the Garpun KrF laser (λ = 248 nm, the pulse duration and energy are ∼70 ns and ∼50 J) was experimentally demonstrated for the first time. The annular laser beam produced a hollow tube ∼10 cm in diameter with an electron density of ∼1012 cm−3 in a plasma wall ∼1 cm thick, over whichmicrowave radiation with λ mw ∼ 8 mm was transmitted to a distance of 60 m. Themicrowave signal transmitted by the waveguide was amplified by a factor of 6 in comparison with propagation in free space.

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Correspondence to A. O. Levchenko.

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Original Russian Text © V.D. Zvorykin, A.O. Levchenko, A.G. Molchanov, I.V. Smetanin, N.N. Ustinovskii, 2010, published in Kratkie Soobshcheniya po Fizike, 2010, Vol. 37, No. 2, pp. 49–56.

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Zvorykin, V.D., Levchenko, A.O., Molchanov, A.G. et al. Microwave energy channeling in plasma waveguides created by a high-power UV laser in the atmosphere. Bull. Lebedev Phys. Inst. 37, 60–64 (2010). https://doi.org/10.3103/S1068335610020077

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  • DOI: https://doi.org/10.3103/S1068335610020077

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