Comparative investigation of the resistance and ability to trigger high voltage discharge for single and multiple femtosecond filaments in air
CHINESE PHYSICS B(2013)
Abstract
A comparative investigation of the resistance and ability to trigger high voltage (HV) discharge for a single filament (SF) and multiple filaments (MFs) has been carried out. The experimental results show that the trend of the breakdown threshold of the SF exactly follows that of its resistance, but this is not the case for the MF. The MF's resistance is much smaller than the SF's. However, the MF shows a slightly higher HV breakdown threshold than the SF. The underlying physics is that the measured resistance of the MF is collectively contributed by every filament in the MF while the HV breakdown threshold is determined by only one single discharging path.
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Key words
femtosecond filament,resistance,high voltage breakdown threshold
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