WASHINGTON — When Benjamin Franklin fashioned the first lightning rod in the 1750s following his famous experiment flying a kite with a key attached during a thunderstorm, the American inventor had no way of knowing this would remain the state of the art for centuries. Scientists now are moving to improve on that 18th century innovation with 21st century technology...
The Laser Lightning Rod, an experimental lighting protection device that diverts the path of lightning bolts using a high-power laser, is seen in action at the top of Mount Santis in Switzerland in this undated photograph.WASHINGTON — When Benjamin Franklin fashioned the first lightning rod in the 1750s following his famous experiment flying a kite with a key attached during a thunderstorm, the American inventor had no way of knowing this would remain the state of the art for centuries.
With further development, this Laser Lightning Rod could safeguard critical infrastructure including power stations, airports, wind farms and launchpads. In experiments during two months in 2021, intense laser pulses — 1,000 times per second — were emitted to redirect lightning strikes. Lightning is a high-voltage electrical discharge between a cloud and the ground, within a cloud or between clouds.
The laser device is the size of a large car and weighs more than 3 tons. It uses lasers from German industrial machine manufacturing company Trumpf Group. With University of Geneva scientists also playing a key role, the experiments were conducted in collaboration with aerospace company ArianeGroup, a European joint venture between Airbus SE and Safran SA.
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