Emerging and expanding streamer head in low-pressure air

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F20%3A00524552" target="_blank" >RIV/61389021:_____/20:00524552 - isvavai.cz</a>
Alternative codes found
RIV/00216224:14310/20:00114159
Result on the web
<a href="https://iopscience.iop.org/article/10.1088/1361-6595/ab7087" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-6595/ab7087</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1361-6595/ab7087" target="_blank" >10.1088/1361-6595/ab7087</a>

Result language
angličtina
Original language name
Emerging and expanding streamer head in low-pressure air
Original language description
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 107 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.
Czech name
—
Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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