Observation of sprite streamer head's spectra at 10,000 fps

Details Observation of sprite streamer head's spectra at 10,000 fps Observation of sprite streamer head's spectra at 10,000 fps

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jgra..11500e48k&link_type=abstract

Journal of Geophysical Research, Volume 115, Issue 5, CiteID A00E48

Physics

Geophysics

2

Atmospheric Processes: Atmospheric Electricity, Atmospheric Processes: Lightning, Mathematical Geophysics: Spectral Analysis (3205, 3280), Atmospheric Composition And Structure: Middle Atmosphere: Composition And Chemistry, Atmospheric Composition And Structure: Instruments And Techniques

Scientific paper

Spatially and temporally resolved sprite streamer head spectra were observed for the first time using a slitless spectrograph at 10,000 fps. The spectra consist of the N2 first positive (1PG) emission. Blue emissions, including the N2 second positive (2PG) and the N2+ first negative (1NG) emissions, were not observed presumably due to atmospheric attenuation along a long line of sight. The rotational temperature derived from the spectra indicates a kinetic temperature of 200-300 K with an upper limit of 400 K. Using a simple kinetic model, we estimate the peak electric field in the streamer head to be larger than 1-2Ek.

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