this post was submitted on 04 Jun 2026
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With the publication today of five deeply researched and peer-reviewed papers, Commonwealth Fusion Systems (CFS) and dozens of collaborating physicists have cemented our confidence in the core plasma physics assumptions at work within our upcoming ARC fusion power plant.

The scientifically rigorous papers, with 58 co-authors, span 226 pages in a special edition of the the Journal of Plasma Physics. They detail how an ARC plant will produce roughly 1.1 gigawatts (GW) of fusion power that we’ll convert into 400 megawatts (MW) of net electricity delivered continuously to the grid — enough to power about 280,000 average American homes.

[...]

  1. Overview of the physics basis for the ARC fusion power plant
  2. Power and particle exhaust for the ARC fusion power plant
  3. ARC disruption physics and strategy
  4. Performance and transport in the ARC tokamak
  5. ARC physics basis — magnetohydrodynamics
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[–] MonkderVierte@lemmy.zip 1 points 7 hours ago

So, does it work?

[–] cmbabul@slrpnk.net 3 points 19 hours ago (1 children)

I’m sorry, I’m not smart enough to nuclear physics and engineering, and ARC reactor like the one in fucking Iron Man’s chest?

[–] Infinite@lemmy.zip 10 points 18 hours ago (1 children)

It stands for "affordable, robust, compact" but is 100% a nod to Iron Man.

It's a little bigger, tho.

[–] Eldritch@piefed.world 1 points 17 hours ago

So..... Ant man's chest?

[–] spicehoarder@lemmy.zip 3 points 22 hours ago (3 children)
[–] reinei@lemmy.world 4 points 10 hours ago* (last edited 9 hours ago)

Well I have not read too much of that edition and I am also not a plasma physicist, but the way that blurb text extract is written it sounds more like "Lots of really smart people simulated our fusion reactor and found no weird physics causing it to explode or simply not turn on".

I think this because they talk about checking the "plasma reaction assumptions"! So in theory it can work, but afaik lots of other fusion reactors could in theory work as well. This says nothing about whether their engineering will be able to actually extract that energy...

Edit: I couldn't resist and at least started the abstracts and they even looked at the theoretical extraction efficiency, but as I am not an expert in anything close to this field I still cannot tell anything about wether or not it will hold water (well, plasma).

[–] LemmyBruceLeeMarvin@lemmy.ml 7 points 15 hours ago

Lotsa ifs. If sparc works, then arc should work too. China's ahead in the plasma game and they don't have a reactor yet that can sustain stable plasma for long enough to generate more than is put in (Q > 1), but the BEST tokamak is targeted for 2027 so we'll see what happens. If they pull it off, shit is gonna get mad real

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