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@article{1659681,
author = {Hoder, Tomáš and Bonaventura, Zdeněk and Prukner, V. and GordilloandVazquez, F.J. and Simek, M.},
article_location = {Bristol},
article_number = {3},
doi = {http://dx.doi.org/10.1088/1361-6595/ab7087},
keywords = {streamer; electric field; low-pressure air; electron density; blue jet; transient luminous events; ionisation wave},
language = {eng},
issn = {0963-0252},
journal = {Plasma Sources Science and Technology},
title = {Emerging and expanding streamer head in low-pressure air},
url = {http://dx.doi.org/10.1088/1361-6595/ab7087},
volume = {29},
year = {2020}
}
TY - JOUR
ID - 1659681
AU - Hoder, Tomáš - Bonaventura, Zdeněk - Prukner, V. - Gordillo-Vazquez, F.J. - Simek, M.
PY - 2020
TI - Emerging and expanding streamer head in low-pressure air
JF - Plasma Sources Science and Technology
VL - 29
IS - 3
SP - 1-7
EP - 1-7
PB - IOP Publishing Ltd.
SN - 09630252
KW - streamer
KW - electric field
KW - low-pressure air
KW - electron density
KW - blue jet
KW - transient luminous events
KW - ionisation wave
UR - http://dx.doi.org/10.1088/1361-6595/ab7087
L2 - http://dx.doi.org/10.1088/1361-6595/ab7087
N2 - The emergence of a streamer from an ionisation wave and its expansion are ultra-fast processes shaping the very first moments of the streamer development, and are usually accessible only by complex numerical models. In this Letter, we report experimental evidence of the emergence of a streamer from an ionisation wave in 1.3 kPa air, a laboratory analogue of early-stage streamers emerging in geophysical Blue Starters and Jets. The radially and temporally resolved electric field patterns of an expanding streamer are determined by sub-nanosecond optical emission spectroscopy. As the emerged streamer expands, the electric field decreases by a factor of 1.4 in 1 ns. We quantify the radial expansion of the streamer head and its axial acceleration, reaching the velocity of 10(7) m s(-1). In combination with electrical measurements, the transferred charge, electron density, and mean electron energy are quantified, enabling detailed insight into this ultra-fast phenomenon at its characteristic time-scale.
ER -
HODER, Tomáš, Zdeněk BONAVENTURA, V. PRUKNER, F.J. GORDILLO-VAZQUEZ a M. SIMEK. Emerging and expanding streamer head in low-pressure air. \textit{Plasma Sources Science and Technology}. Bristol: IOP Publishing Ltd., 2020, roč.~29, č.~3, s.~1-7. ISSN~0963-0252. Dostupné z: https://dx.doi.org/10.1088/1361-6595/ab7087.
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