Laser Triggered and Guided DC Electrical Discharge in Air

Optical breakdown of air triggered by femtosecond laser filaments

Experiments on gas breakdown by powerful optical pulses date back to the early days of lasers. The following development resulted in the generation of dense plasma columns up to several tens of meters in length. Pulsed neodymium-glass and CO2 lasers used in these demonstrations had pulse energies of several hundred Joules. Optical breakdown with high-energy nanosecond (or longer) laser pulses i...

Tesla coil discharges guided by femtosecond laser filaments in air

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Self-Guided Intense Laser Pulse Propagation in Air

Improvement of the atmospheric discharge laser-triggered ability using multiple pulses from a kilohertz KrF laser

The potential ability of lasers to control lightning can be improved by using a train of pulses with submillisecond separations. Laser-triggered experiments in a small-scale ͑10-mm gap͒ atmospheric discharge facility show that the triggering is dramatically enhanced when a five-pulse train of sub-Joule energy is used instead of a single pulse. This effect increases rapidly as the pulse interval i...

Preparation of carbon nanotubes by DC arc discharge process under reduced pressure in an air atmosphere

Carbon nanotubes (CNTs) were grown using a DC arc discharge process in an air atmosphere and relevant process parameters were investigated. ithout using an inert gas, multi walled carbon nanotubes could be synthesized in the deposit area of the cathode even in an air atmosphere, but ingle walled carbon nanotubes were not detected in the soot area despite using the same process conditions as in ...