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this post was submitted on 15 Apr 2024
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Those scaling issues have always been the issues. We've had working reactors for over 65 years.
"The first experiment to achieve controlled thermonuclear fusion was accomplished using Scylla at LANL in 1958."
And don't think that the NIF ignition results are the kind of breakthrough that headlines make it out to be - that project is weapons research, and is not designed to produce power, nor is it anywhere close to doing so when the power to the lasers is measured and not just what the pellet absorbs.
However, what's new in the last few years is commercial investment in fusion, and I do think that it will make the difference that the last 65 years haven't. Maybe even in the next 20 years™
we attained net-positive over a year ago: https://www.cnbc.com/2022/12/13/nuclear-fusion-passes-major-milestone-net-energy.html
as for scaling issues, we have just been able to tolerate 100 million degree reaction for a record amount of time, a breakthrough that sets a new milestone. a pretty big step beyond, ahem, 1958.
You've been taken in by intentionally deceptive headlines.
The energy absorbed by the pellet (what they are measuring as the "input") is something like 1/20th or worse of the energy used to power the lasers. The output is greater than that "input" by a little, but again, nowhere near the actual energy used, and it won't ever be at that experiment because it's not designed for it, it's designed so we can simulate H-bombs without setting off real ones.