Journal
APPLIED PHYSICS LETTERS
Volume 99, Issue 22, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3665633
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Funding
- National Natural Science Foundation of China [50777035]
- National Basic Research Program of China (973 program) [2011CB209403]
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Electric field (E-field) in air gap streamer discharges under positive lightning impulse was measured by specifically developed integrated electro-optic sensors. An E-field step phenomenon was observed. The E-field firstly agreed with the Laplace field, then suddenly increased with a rise time of mu s. The occurrence probability of this phenomenon increased as the applied voltage increased. The discharge current waveforms and photos taken by a fast camera prove the E-field step was caused by the space net charge. From the E-step rise time and the corona area range, the average electron drift speed under the experiment situation was estimated about 0.2 x 10(6) - 0.6x 10(6) m/s. (C) 2011 American Institute of Physics. [doi:10.1063/1.3665633]
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