this post was submitted on 10 Jan 2026
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[–] RubberElectrons@lemmy.world 31 points 2 days ago (1 children)

In sum, these guys at EAST got the Greenwald limit elevated in their tokamak, which indirectly influences the Lawson criterion: nTTau, density * time at said density * plasma energy released. Lawson is the master finish line for measuring whether a fusion system can actually make more power than it consumes.

To date, when you cross the Greenwald limit, the man/woman in the operators seat should expect the plasma inside the device to become uncontrollable, hurting the reactor by touching the walls or instruments inside, a so-called "disruption". Only a few topologies like the stellerator can exceed the limit, and so far, only by 5x.

But here we have a way to exceed the limit in the much more researched tokamak. This research has positive impact for all but the weirdest/niche fusion devices.

[–] nialv7@lemmy.world 6 points 2 days ago

Artificial sun rising from the EAST? These guys know how to name things.

[–] AnimalsDream@slrpnk.net 70 points 3 days ago

*Slaps on top of fusion reactor*

"You can boil so much water with this."

[–] echodot@feddit.uk 79 points 3 days ago (3 children)

If China has managed to do something that scientists genuinely thought was impossible why are there several nuclear fusion research facilities all over the planet? If it's impossible that seems like a bad use of resources.

I think maybe that scientists thought it was entirely possible, and that's why they were trying to do it.

[–] Nalivai@lemmy.world 30 points 3 days ago* (last edited 3 days ago) (1 children)

Scientist: "Scientific discoveries are meaningless when taken out of context."

Newspaper: "Scientist confirms that scientific discoveries are meaningless."

[–] iglou@programming.dev 33 points 3 days ago

Journalist reads "limit" and clickbaits it, typical

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[–] Slovene@feddit.nl 305 points 4 days ago (8 children)

Meanwhile USA is stealing Venezuelan oil. Good job everbody. 👍

[–] Deceptichum@quokk.au 159 points 4 days ago* (last edited 4 days ago) (9 children)

Just a few years ago US labs were the first to generate more power than they put into a fusion reactor, it was one of the most important breakthroughs to date in fusion.

Even under the shitheap Trump, the US is continuing to research into fusion and building stellarators such as Infinity 1 in Tennessee.

Europe likewise is leading breakthroughs such as with Wendelstein 7-X stellarator in Germany lasting for 43 seconds. This is being improved with the new Proxima Alpha stellarator being built.

China’s EAST reactor had a breakthrough when they achieved 1,000 seconds last year. While Europes recent ITER tokamak should be achieving its first plasma in the coming years.

Fusion is a global effort, and scientists are benefiting from the works being put in elsewhere. Stellarators and Tokamak are both breaking new grounds each year, and each has their own pros and cons.

Don’t fall for any propaganda trying to claim anyone is “winning”.

[–] sibachian@lemmy.ml 42 points 4 days ago (10 children)

oil, coal and nuclear are clearly not winning.

we could solve the worlds energy problems today but they'd never be applied simply because oil exists. its literally why the US just attacked venezuela. They could have built another reactor or windmills or whatever the fuck else they feel they need if energy was the reason. but energy has nothing to do with energy and all to do with being a natural monopoly that's making a small group of people quite wealthy.

[–] Deceptichum@quokk.au 35 points 4 days ago* (last edited 4 days ago) (7 children)

Yes but those are not fusion. Fusion is the 'holy-grail' of energy technology. It is a long term goal that we must work towards. It's a problem of science.

For now renewables are the cheapest, quickest, and best method we have. They should be receiving all the money wasted on those 3 methods you've mentioned above. That's a problem of politics.

We easily have the means to achieve both, we are hamstrung by shortsighted corporate interests and yes this applies to China as well.

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[–] HugeNerd@lemmy.ca 24 points 3 days ago (3 children)
[–] spacesatan@leminal.space 29 points 2 days ago* (last edited 2 days ago) (2 children)

If China's economic ascendancy happened 50 years sooner we would probably already have it. Democracies are allergic to massive capital investments that take decades to pay off.

Obviously the graph is very out of date, US funding is around 600 million 2012 dollars annually and China's is double that.

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[–] UnderpantsWeevil@lemmy.world 12 points 3 days ago (11 children)

Practical power production through nuclear fusion still requires significant developments for it to be realised at scale, though several startups are already planning to deliver it within the next few years.

US-based Helion Energy secured the world’s first purchase agreement for nuclear fusion energy in 2023, promising to provide 50MW of fusion power to Microsoft by 2028.

I mean, time will tell. But that seems a bit sooner than 2100.

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[–] AA5B@lemmy.world 149 points 4 days ago (5 children)

I really hate how so many of these articles feel like they need to dumb it down with this “artificial sun” imagery. It feels so condescending. I’d rather learn more about the latest progress with nuclear fusion

[–] mckean@programming.dev 46 points 3 days ago (2 children)

articles such as this one usually are optimized for their audience, you just aren't the audience. that's ok. I'm rarely the audience either :) a quick search should give you what you're looking for https://www.science.org/doi/10.1126/sciadv.adz3040

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[–] brownsugga@lemmy.world 16 points 3 days ago (1 children)

Most Americans read at or below a 6th grade level

[–] jabjoe@feddit.uk 11 points 3 days ago (1 children)

So we hear. But the world is not America and this is a British newspaper.

[–] Corkyskog@sh.itjust.works 2 points 2 days ago

To be fair I don't think literacy rates in the UK blow the US out of the water or anything.

[–] humanspiral@lemmy.ca 28 points 3 days ago (7 children)

article didn't say anything. How does denser plasma achieve higher temperatures or other benefits? What advances did their denser plasma produce?

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[–] ekZepp@lemmy.world 110 points 4 days ago* (last edited 4 days ago) (48 children)

I'm not a fan of China (government)... at all. But when I check all the technological breakthrough they are getting in these last years while the US was inflating his fucking ai-bubble. Objectively, they are getting so far ahead is not even funny. At least Europe is on a good track themself.

[–] nucleative@lemmy.world 41 points 3 days ago (8 children)

I'm no China expert but I lived In South China for a while between 2016 and 2024. The Chinese people I know are mostly hardworking, very motivated to succeed, and well capitalized. In their major cities you might be surprised to learn normal guys who earn half what you do are living a higher quality of life than you are, in terms of access to technology.

Their government is no doubt using uncouth methods to give their country unfair advantages. They don't play well with others.

But holy shit there is one thing this Chinese government is doing well: effectively driving growth with targeted investments in the economy. They have been focused on that one mission consistently for a long time.

While democracies fuck around trying to decide if they should tax themselves to build public transportation, China installs 10 new ultrafast subway lines in just a few years in every big city. Covers the country in a network of high-speed rail. Drives the price of shipping goods around the country to almost nothing.

A kind of monoparty like China has is very likely a net negative when we look at world history, but for moments of time, if it's the right one, amazing things can happen.

[–] phx@lemmy.world 18 points 3 days ago (1 children)

One thing I've been impressed with China for is moving towards greener technologies. They're a leader in solar, their EV's are apparently very good (not that I can get one here to verify that), and they're pretty dogged in their pursuit of nuclear energy.

Meanwhile USA is apparently still in "let's overturn regimes and take over other countries for the oil companies" mode

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[–] sobchak@programming.dev 12 points 3 days ago

China is now the world leader in science by most metrics (largest proportion of the top 1% most cited papers, most publications to prestigious journals, etc). It makes sense, with their high population and their government willing to fund research. I'm guessing their culture is much less anti-intellectual than the West too, especially the US.

[–] CosmoNova@lemmy.world 16 points 3 days ago (2 children)

The overwhelming majority of their so called breakthroughs are just media fluff pieces though. Their sources are more and more often AI generated studies and their supposed advancements aren‘t going anywhere a lot of the time. By the time people start asking questions and want to know more details they have already prepared another story for you to be impressed by. It‘s shock and awe.

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[–] HK65@sopuli.xyz 17 points 3 days ago (12 children)

Is it only me that had the C&C Generals Nuke Cannon tagline going off in their heads saying BRIGHTER THAN THE SUN in a deliberate voice and a heavy Chinese accent?

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[–] gandalf_der_12te@discuss.tchncs.de 14 points 3 days ago* (last edited 3 days ago) (9 children)

This diagram shows the LCOE (levelized cost of electricity) for various technologies - i.e. how much does one kWh of electricity cost if you divide the total number of generated kWh by the total cost of the power plant.

"utility-scale solar" means large-scale flat-area solar parks

But will Fusion ever be cheaper than solar?

I doubt it; It's not only about technology costs but also about advantages like decentralization. If you can generate your own electricity in your own back-yard, you're much more independent than if you're dependent on large-scale fusion power. Because that will necessarily be very large-scale and centralized because nobody can set up a fusion reactor in their own back yard.

[–] Piemanding@sh.itjust.works 1 points 1 day ago (1 children)

Solar has the problem of storage. You need something like a generator to tide those in-between times. Also you need the signal to be a clean 60 hz and solar apparently isn't very good at keeping the power clean.

Yeah i was thinking one could probably generate something like synthetic petroleum when one has excess clean energy and store the synthetic fuel for many months.

[–] HK65@sopuli.xyz 12 points 3 days ago (2 children)

Solar is technically fusion though

[–] supersquirrel@sopuli.xyz 23 points 3 days ago (1 children)

Solar is Fusion as a Service or FaaS technology.

[–] mumblerfish@lemmy.world 9 points 3 days ago

The sun is in the cloud(s)?

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[–] BurnoutDV@lemmy.world 10 points 3 days ago (3 children)

but isnt it being centralized being the point? I have the (probably not so rare) tin foil theory that big energy spends a lot of money to dampen solar and other decentralized power generation. As a politician you have to ask yourself, do I get nice packages from big energy for not looking so closely when another forest is turned into a hole or do I hope that 20000 random people try to bribe me for something. In terms of money gain for a few big power plant is double plus good. Boring solar might be better for all of us, the rest, but not for the guys calling the shots. This all assumes of course that there is no empathy at all in the local legislation

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[–] UnderpantsWeevil@lemmy.world 6 points 3 days ago (1 children)

But will Fusion ever be cheaper than solar?

Eventually. But, much like traditional fission power, you'll need a very large and complex piece of infrastructure to deliver it.

You won't be able to put a fusion plant in your basement like you can put solar on your roof.

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[–] A_A@lemmy.world 52 points 4 days ago

Higher density, yes, but at the cost of lower temperatures. So not as good. Nice but old new. With painfullll advertisement.

Through a new process called plasma-wall self organisation, the CAS researchers were able to keep the plasma stable at unprecedented density levels.
The latest breakthrough was detailed in the journal : Science Advances (https://www.science.org/doi/10.1126/sciadv.adz3040 )in a study titled ‘Accessing the density-free regime with ECRH-assisted ohmic start-up on EAST’.

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