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Electron-neutral bremsstrahlung radiation fingerprints the initial stage of nanosecond discharge in liquid water

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BÍLEK Petr TUNGLI Ján HODER Tomáš ŠIMEK Milan BONAVENTURA Zdeněk

Rok publikování 2021
Druh Článek v odborném periodiku
Časopis / Zdroj Plasma Sources Science and Technology
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www https://doi.org/10.1088/1361-6595/abef18
Doi http://dx.doi.org/10.1088/1361-6595/abef18
Klíčová slova plasma in liquids; nanosecond discharge in liquid water; bremsstrahlung
Popis We postulate that basic radiative signatures observed during the initial phases of nanosecond discharge in liquid water can be attributed to the electron-neutral bremsstrahlung process. Principal characteristics of the radiation collected from developing luminous filaments consist of a sharp decrease in the emission intensity at the short-wavelength side of the spectra, followed by a maximum and subsequent decrease in intensity towards near-infrared wavelengths. All these radiative features can be attributed to the electron-neutral bremsstrahlung produced by a bell-like energy distribution of the electrons. Such an electron energy distribution function is coherent with the concept of electric field emission into electrostriction-induced nanovoids. The findings of this work help in elucidating the hitherto unclear mechanism(s) of plasma generation in liquid water.
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