Year-end Sale % OFF 
Abstract
The time-resolved spectrum of a lightning stepped leader in downward process has been obtained by using a slitless spectrograph. Neutral oxygen and nitrogen spectral lines in the near infrared region are observed in the spectra. The electron density of the lightning stepped leader was calculated by using the Stark broadening of the oxygen spectral lines at 777.4 and 844.6 nm. The evolution characteristic of the electron density with time and channel height of the lightning stepped leader was analysed. The results shown that the electron density of the lightning stepped leader was in the order of 1018 cm-3. The electron density decreased when the lightning stepped leader propagates downward to ground.
Highlights
A stepped leader is the initial stage in lightning discharge processes and develops the channel of lightning
The physical characteristics of a stepped leader in the propagation process have always been an important topic in lightning prediction.[5,6]
Recent reports[14,15,16,17,18,19,20] shown that stepped leaders can produce gamma-ray and X-ray emissions which may be directly associated with the step formation process
Summary
A stepped leader is the initial stage in lightning discharge processes and develops the channel of lightning. Electron density measurement of a lightning stepped leader by oxygen spectral lines Many internal physical parameters (e.g. temperature, electron density, electrical conductivity) of a lightning channel cannot be obtained by using the two methods.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
