Is it for real this time?

What do you ask? Well, the claim that we have finally mastered Fusion:

From the other side of a wide glass window on the third story of the National Ignition Facility (NIF), the world’s largest laser array looks an awful lot like the world’s largest plumbing project. Row after row of 16-inch-diameter pipes are packed into a room like cigarettes in a box—only the box is the size of three football fields. A catwalk thick with miles of cable runs through the center. Large metal ducts snake overhead and along the walls. I have to take it on faith that the pipes, called beam tubes, don’t contain water or gas, but 192 separate laser beams zipping back and forth. When the beams finally exit the room, their strength amplified more than a quadrillion times, they will converge on a pencil-eraser-size target in one short, powerful pulse. And in those 20-billionths of a second, I’m told, atoms of hydrogen will smash together with such force that they’ll essentially create a star.

It sounds impressive—and certainly looks imposing—but society has been taking promises of fusion on faith for more than five decades. If fusion works as proponents claim, it could produce enough clean energy to power the world for hundreds and hundreds of years to come. One of the first hurdles is the tiniest component, the fuel: Hydrogen isotopes, such as deuterium and tritium, adamantly resist uniting, regardless of the amount of heat and steel and funding thrown into the effort.

But this past fall, physicists at NIF, based at Lawrence Livermore National Laboratory in California, made an important advance with their elaborate building and enormous laser: They fired 121 kilojoules of ultraviolet light into the $3.5 billion facility’s target chamber, causing deuterium and tritium nuclei to fuse into helium atoms, releasing 300 trillion high-energy neutrons. Even though NIF and other labs have created fusion before, the achievement brings researchers a step closer to conquering the ultimate challenge: a fusion reaction that produces more energy than is required to start it.

Expensive megaprograms such as NIF aren’t the only ventures making progress. At the other end of the funding spectrum, a number of innovative startups have also begun to yield promising results. After decades of frustratingly slow research, the emergence of real, practical fusion power may come down to a race between these entrepreneurial Davids and the government-run Goliaths.

Hope this pans out, because we need that energy and will need a lot more of it as more people start enjoying the wonders of a modern society, because just like those that point out teaching abstinence doesn’t work too well, the advice of some crazy guy about how people should just not reproduce isn’t the answer. Now if I could just figure out how much energy those 300 trillion high-energy neutrons really equate to…..

Comments are closed.

  1. Kimpost

    Unfortunately they are still decades away, unless something new and ground braking suddenly emerges. I think that fusion will happen, some day, but would be very surprised if there was a commercial reactor by 2050.

    Keep at it though. Meanwhile we’ll just have to use up the fossil fuels we have (as cleanly as we can), and keep making the alternatives more viable by increasing their efficiency and decreasing cost.

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    Unfortunately they are still decades away, unless something new and ground braking suddenly emerges. I think that fusion will happen, some day, but would be very surprised if there was a commercial reactor by 2050.

    Agreed, not only do they have to sustain a fusion reaction, they have to get a significant net output , given how much raw power that has to go into just starting a reaction………………………….

    Maybe well get lucky and at the least get fusion rockets.

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  3. InsipiD

    I doubt that paranoid liberals running aimlessly but loudly away from fission are likely to give fusion some kind of eco-hug in the midst of all that screaming. P.J. O’Rourke once quoted a liberal energy analyst as saying that a fusion-style glut of cheap, harmless energy would be a nightmare for him. Count on the ecotards raising a huge stink about this.

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  4. Seattle Outcast

    I think it’s a given that government run/financed fusion projects would NEVER produce a fusion reactor. Once they did everyone would have to go out and get another job.

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  5. davidstvz

    Not only does the reaction have to produce more energy than it took to start it, it needs to be controllable. They need to capture that energy and convert it to electricity. 2050 is probably very optimistic.

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