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We triggered and guided the stationary electric field discharges in 3—23 cm long air gaps by using plasma channels produced by 40mJ ultrashort laser pulses. We have observed that the plasma channel reduced the discharge breakdown voltage to 40% of its natural value. By analyzing the delay between the laser pulse and the white light emission of discharge, we evaluated the speed of the stepped leader with laser guiding to be about 107 cm/s.
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Keywords:
- plasma channel /
- discharge
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