Title :
Characterization of Electric Field Pulses Produced by Cloud and Ground Lightning Discharges
Author :
Nag, Amitabh ; Rakov, Vladimir A.
Author_Institution :
Florida Univ., Gainesville
Abstract :
We examined microsecond-and submicrosecond-scale pulses in electric field records of cloud and cloud-to-ground lightning discharges acquired in summer 2006, in Gainesville, Florida. A total of 12 cloud and 12 ground flashes were analyzed in detail, with the electric field record length being 96 or 200 ms and sampling interval being 4 or 10 ns. The majority of pulses in both cloud and ground discharges analyzed in this study were associated with the initial breakdown process and were relatively small in amplitude and duration. The typical durations were an order of magnitude smaller than tens of microseconds characteristic of "classical" preliminary breakdown pulses. We estimated that 26% of the pulses in the 12 cloud discharges and 22% of the pulses in the 12 cloud-to-ground discharges had total durations less that 1 mus.
Keywords :
clouds; electric fields; lightning; Florida; Gainesville; breakdown process; cloud lightning discharges; cloud-to-ground lightning discharges; electric field pulse characterization; microsecond-scale pulses; submicrosecond-scale pulses; Antenna measurements; Clouds; Electric breakdown; Electric variables measurement; Instruments; Lightning; Pulse amplifiers; Sampling methods; USA Councils; Wideband;
Conference_Titel :
Electromagnetic Compatibility, 2007. EMC 2007. International Symposium on
Conference_Location :
Qingdao
Print_ISBN :
978-1-4244-1371-3
Electronic_ISBN :
978-1-4244-1372-0
DOI :
10.1109/ELMAGC.2007.4413429