Radially and temporally resolved electric field of positive streamers in air and modelling of the induced plasma chemistry

0464627 - ÚFP 2017 RIV GB eng J - Článek v odborném periodiku
Hoder, T. - Šimek, Milan - Bonaventura, Z. - Prukner, Václav - Gordillo-Vázquez, F.J.
Radially and temporally resolved electric field of positive streamers in air and modelling of the induced plasma chemistry.
Plasma Sources Science & Technology. Roč. 25, č. 4 (2016), č. článku 045021. ISSN 0963-0252. E-ISSN 1361-6595
Grant CEP: GA ČR(CZ) GA15-04023S
Grant ostatní: Rada Programu interní podpory projektů mezinárodní spolupráce AV ČR(CZ) M100431201
Program: M
Institucionální podpora: RVO:61389021
Klíčová slova: streamer * electric field * Blue Jet * air plasma chemistry * transient luminous event
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
Impakt faktor: 3.302, rok: 2016
http://iopscience.iop.org/article/10.1088/0963-0252/25/4/045021/meta

The initial stages of transient luminous events (TLEs) occurring in the upper atmosphere of the Earth are, in a certain pressure range, controlled by the streamer mechanism. This paper presents the results of the first laboratory experiments to study the TLE streamer phenomena under conditions close to those of the upper atmosphere. Spectrally and highly spatiotemporally resolved emissions originating from radiative states N-2(C-3 Pi(u)) and N-2(+)(B-2 Sigma(+)(u)) have been recorded from the positive streamer discharge. Periodic ionizing events were generated in a barrier discharge arrangement at a pressure of 4 torr of synthetic air, i.e. simulating the pressure conditions at altitudes of similar or equal to 37 km. The reduced electric field strength distribution within the streamer head was determined from the ratio of the N-2(+)/N-2 band intensities with peak values up to 500 Td and overall duration of about 10 ns.
Trvalý link: http://hdl.handle.net/11104/0263460