Author Topic: At the Brink of Fusion Ignition at National Ignition Facility  (Read 718 times)

rcjordan

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At the Brink of Fusion Ignition at National Ignition Facility
« on: November 21, 2021, 07:27:24 PM »
TLDR; This experiment produced fusion yield of roughly two-thirds of the laser energy used

https://scitechdaily.com/fusion-breakthrough-at-the-brink-of-fusion-ignition-at-national-ignition-facility/

ergophobe

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Re: At the Brink of Fusion Ignition at National Ignition Facility
« Reply #1 on: November 23, 2021, 09:19:18 PM »
Is this a thing where at 10% over breakeven you suddenly unlock a huge amount of energy because you cycle 101% back into the process and the 9% is a lot, or is this still very far away?

I long ago decided I would not see a functioning fusion power plant selling retail power in my lifetime. I'd say I'm slightly less sure, but still not convinced this is on the horizon.

rcjordan

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Re: At the Brink of Fusion Ignition at National Ignition Facility
« Reply #2 on: December 03, 2021, 07:22:31 PM »
<update>

Early reports referred to this breakthrough as the “brink of ignition,” because it yielded less than the 1.9 MJ supplied by the facility’s 192 laser beams. But many fusion scientists think such a perspective is too conservative. “As far as most people working in the field are concerned, the scientific demonstration of the ignition process has indeed been achieved,”


Physics - Ignition First in a Fusion Reaction
https://physics.aps.org/articles/v14/168

ergophobe

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Re: At the Brink of Fusion Ignition at National Ignition Facility
« Reply #3 on: December 07, 2021, 03:47:21 AM »
Finally, a Fusion Reaction Has Generated More Energy Than Absorbed by The Fuel
https://www.sciencealert.com/for-the-first-time-a-fusion-reaction-has-generated-more-energy-than-absorbed-by-the-fuel

Update: Actually, I think that's a new article on the old news - it's about the experiment from August with 1.3 megajoules of output for 1.9 megajoules of input. So it's still way short of breakeven, it's just looking at the energy differently. Energy absorbed by the fuel is less than the energy produced by the reaction, but energy produced/used by the lasers was still 50% higher than the energy produced by the fuel, which is still way less than the energy inputs into the lasers.
« Last Edit: December 07, 2021, 03:56:06 AM by ergophobe »