• PM_me_your_vagina_thanks@kbin.social
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    1 year ago

    Still used orders of magnitude more energy to perform the experiment than the experiment output - plus they have no way to harvest that energy, and they’re mainly a nuclear weapon research facility. I guess the publicity for fusion power is good.

      • exscape@kbin.social
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        1 year ago

        The key words are “delivered to the target”. They use WAY, way more power than they deliver to the target, so if you take the energy generated divided by the total energy used, the number is WAY, way below 1. Probably a fair bit below 0.1 too.

    • Echo Dot@feddit.uk
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      1 year ago

      Still used orders of magnitude more energy to perform the experiment than the experiment output

      The article literally explains that is not true. All you have to read the first paragraph.

      they have no way to harvest that energy

      Yes because it’s a research reactor. The first theoretical nuclear reactors also did not have any way to retrieve the energy. That’s what happens in production systems, not research systems. Adding in all of the equipment to capture the energy makes it harder to iterate on the design. It really is not a valid criticism of the research being done.

      You are being somewhat disingenuous do not think.

      • Chup@feddit.de
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        1 year ago

        In the 1st paragraph is a link to the previous article of the same experiment a few months ago, that has some more details mentioned:

        researchers have managed to release 2.5 MJ of energy after using just 2.1 MJ to heat the fuel with lasers.

        the positive energy gain reported ignores the 500MJ of energy that was put into the lasers themselves.

        https://www.theguardian.com/environment/2022/dec/12/breakthrough-in-nuclear-fusion-could-mean-near-limitless-energy

        • Echo Dot@feddit.uk
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          1 year ago

          The whole point is that they put less energy into the target material than they got out of it, however much energy they had for the rest of the experiment isn’t relevant. The only part of this design that they are researching here is the fusion, everything else is supporting that research and is not been actively developed by this team.

          There are other teams working on other reactor designs which increase efficiency in other areas.

          It’s like saying that a rocket engine demonstration model doesn’t work because it doesn’t fly.

          • PM_me_your_vagina_thanks@kbin.social
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            1 year ago

            And the whole point of my comment is that people shouldn’t be wetting their pants thinking that fusion is right around the corner. This is just further proof of concept and does nothing to actually advance fusion power.

          • CanadaPlus@lemmy.sdf.org
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            1 year ago

            It’s a good example. I’d actually say test-firing a rocket and claiming you’re almost on the moon is still misleading, though.

            Energy in over energy generated at the target has no practical significance. More output is better but that’s it. This is for marketing to funders.