Frequency conversion, "superluminal" propagation, and compression of a powerful microwave pulse in propagating ionization front.
basic_science · Level V
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- Record sourced from PubMed, PMID 37198856.
- Also identified by DOI 10.1103/PhysRevE.107.045203.
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Abstract
Frequency up-conversion (∼10%) and compression (almost twofold) of a powerful (≤250 MW) microwave pulse in the propagating ionization front produced by the pulse itself in a gas-filled waveguide, is investigated experimentally and analyzed theoretically. Pulse envelope reshaping and group velocity increase manifest themselves in a propagation of the pulse faster than in the empty waveguide. A simple one-dimensional mathematical model allows the adequate interpretation of the experimental results.