back to article Laser-wielding boffins bend lightning to their will

Scientists have for the first time demonstrated that a laser can act as a lightning rod to disperse these dangerous atmospheric discharges. Although lab-based demos have proven the concept, an experiment conducted on the Säntis Mountain in northeastern Switzerland in late 2021 - and only detailed in Nature this week - showed …

  1. Neil Barnes Silver badge

    It has been said

    That lightning rods on church steeples represent the triumph of science over religion.

    Can we expect pretty light shows in future on steeples?

    1. Winkypop Silver badge
      Trollface

      Re: It has been said

      Perhaps.

      And it might also lower the churches fire insurance policy.

      1. FIA Silver badge

        Re: It has been said

        So the triumph of science and maths over religion?

    2. abstract

      Re: It has been said

      Religion is what you worship. You are an idolater if you worship technology. Islam says "they worship what they make with their own hands".

      Those worshiping money, technology, nationalism or other people are insane idolaters.

      By the way, the atheists claim that they make the technology but it's the other way around it's the technology that blinds them: they are just idolaters.

      In other words, there is no opposition between technology and pure monotheism : it is Islam that radically changed the way we abstract the world, the problem is in the relation people have with things they make with their hands and worship.

      Like the Titanic, they said "even God can't sink it". An ice cube will do...

      1. Anonymous Coward
        Anonymous Coward

        Re: It has been said

        And next on Al Jazeera is “Debbie Does Dallas”.

  2. Will Godfrey Silver badge
    Boffin

    Just a thought

    I wonder if ths could be a route to harvesting lightning energy - although I've no idea what could store such huge amounts in such a short time.

    1. Flak
      Coat

      Easy - A Flux Capacitor!

      1.21 Gigawatts' worth.

      1. KarMann Silver badge
        Terminator

        Re: Easy - A Flux Capacitor!

        I assume yours is the one with the bullet-proof vest?

        1. TRT

          Re: Easy - A Flux Capacitor!

          The Libyans!

    2. TRT

      Re: Just a thought

      Hopefully by modulating the laser and using, say, a grid of emitters or possibly reflective surfaces that can fire in turn, the storm energy could be pulsed more gently into an array of storage cells - maybe heating salt water or silica in underground vats. It's hopeful that the seemingly random pattern of lightning strikes could become more directed and controllable.

    3. teknopaul

      Re: Just a thought

      I hope this can make power.

      Because replacing Benjamin Franklin's solution that has a very low CO2 cost, with this high tech and high power solution seems like its not progress at all.

      Cool tech. But not practical until we have, free energy, no planes, and a power supply that does randomly turn off in bad weather.

    4. Evil Auditor Silver badge
      Devil

      Re: Just a thought

      ...although I've no idea whatwho could store such huge amounts in such a short time.

      Oh, I could provide you with a list of names...

  3. ComputerSays_noAbsolutelyNo Silver badge
    Joke

    ... and now, the scientists should record an accompanying metal album. "Guide the Lightning" would be my suggestion.

  4. Andy E
    Alert

    What about the other way?

    I can see this working well for lightning strikes that are going earth to cloud but what about when they are traveling down from cloud to earth. Won't something get frazzled?

    1. Mark #255

      Re: What about the other way?

      It's not massively clear from the video, but the laser beam guides the strike towards the tower (since a big metal structure has a much lower impedance than a thin ionised pathway through the air).

      This protects the laser and the focusing telescope (they called it a telescope, so I will too) as the current gets diverted away from the ionised path running down to the big ol' death ray machine.

      In lightning strikes, there's typically a "small" strike from cloud to earth followed milliseconds later by a "big" return stroke. All the things affected by lightning don't really care which way the electrons are running, just that there's so many of them.

    2. teknopaul

      Re: What about the other way?

      Simple: just put a lightning rod on the big fat laser.

  5. S4qFBxkFFg

    Would this work with the "lightning" produced by a tesla coil, i.e. directing it from the coil to a specific point on the ground?

    1. Kevin McMurtrie Silver badge
      Black Helicopters

      Black helicopters will appear if you figure it out. A tunnel of low frequency RF energy could add easy megawatts to a pew-pew gun.

  6. KittenHuffer Silver badge

    Now we just need to train the sharks to swim around the tower in an orderly fashion!

    1. Evil Auditor Silver badge

      And I was wondering how they entertained a shark on top of a mountain. Bloody Swiss! Where is PETA when you need them?

  7. Terje

    So correct me if my laser physics fundamentals are a bit shaky, but if it's a problem with mW continuous lasers pointed in the sky around airports and such, I have to admit that I fail to see how a TW infrared pulse laser would not be significantly bigger hazard?

    1. SkippyBing

      As long as they aren't pointing into aircraft cockpits it shouldn't be a problem. The concern around airports is blinding/dazzling pilots more than anything else.

      1. Anonymous Coward
        Anonymous Coward

        I wonder if a terawatt pulse would not cook the retinas of anyone in its path, even via reflection.

        We may not see IR, but that doesn't stop from it from being a tad toasty to ye olde eyeball Mark I..

      2. Dizzy Dwarf

        Indeed - this is why you rarely see sharks close to airports. It's a CAA thing.

    2. Fruit and Nutcase Silver badge

      "The laser is powerful enough to be a risk to the eyes of overflying pilots, and during the experiments air traffic was closed over the test site."

      https://www.theguardian.com/science/2023/jan/16/scientists-steer-lightning-bolts-with-lasers-for-the-first-time

    3. Kevin McMurtrie Silver badge

      Or burning holes in birds. They're essentially creating something like a giant neon sign tube by blasting away the air with a high power IR pulse. They said that brilliant green glow is just a little bit of harmonic distortion.

      1. Anonymous Coward
        Anonymous Coward

        So bad for pilots, but also good by preventing bird strike. Decision, decisions..

        :)

  8. An_Old_Dog Silver badge

    Cost-Effectiveness

    Nice field test ("It can be done!"), but not economically-feasable, unless you're protecting a majorly-more expensive thing from lightning.

  9. anonanonanonanonanon

    Wouldn't lightning rods be cheaper?

    Surely just installing lightning rods would be saner? I don't know how much a lightning rod costs, or how big an area this laser can cover, but I'm reckoning even installing thousands of lightning rods is going to be cheaper than one of these things

    1. Anonymous Coward
      Anonymous Coward

      Re: Wouldn't lightning rods be cheaper?

      The idea is to extend the lightning rod effect. It's a game of probabilities - the higher it reaches, the more likely it is that it will discharge a lightning strike instead of the bolt zapping something else. The idea is to provide the easiest path for the charge to take, in this case via ionisation.

      You will still need something to duct the result to Earth, so you would still have a (few) lightning rod(s), or a Tesla with no tyres on its rims - something that connects to ground and you don't mind terribly losing if it gets a bit too much in one go.

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