Development of a spectrometer to measure the blue components of sprites

Details Development of a spectrometer to measure the blue components of sprites Development of a spectrometer to measure the blue components of sprites

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jastp..65..643k&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 65, Issue 5, p. 643-646.

Physics

Scientific paper

Recent spectral measurements of sprites and elves using imaging spectrometers have been limited to the red end of the spectrum (above 500nm), while spectral information from the blue end of the spectrum has been measured only by bandpass-filtered photometers. Although the blue photometric data identified N2 second positive and N2+ first negative band emissions, uncertainty remains in some measurements due to the small separation in the emission lines. Spectrally resolved measurements of the blue components, particularly the emissions of N2+ 1N band, are very important because they indicate the existence of relatively high electron energies and high level of ionization at that altitude and therefore can be a great help in uncovering the generation mechanism for sprites. We have recently developed an intensified CCD slit spectrograph system with a peak sensitivity around 350nm with a highly linear dispersion and a spectral resolution of 2nm.

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