MIT's Pathway to Fusion Energy (IAP 2017) - Zach Hartwig
Why Hacker News recommends it
Recommended again and again as the best accessible overview of fusion physics, useful for judging fusion announcements and understanding why high-temperature superconducting magnets matter.
What it is
Zach Hartwig of MIT introduces the key concepts of magnetic fusion energy and the state of fusion research. He then presents MIT's proposed pathway of using high-field superconducting magnets to build smaller, cheaper tokamaks on a climate-relevant timescale.
Recommended by 16 HN commenters across 13 different months, 2017 to 2023.
What Hacker News said
Strong rec kkwteh · 2017-08 · on “Nuclear fusion is on the brink of a milestone, but faces lack of funding [audio]”
This talk by Zach Hartwig from IAP 2017 "MIT's Pathway to Fusion Energy" is fantastic. Hartwig is an assistant professor in the Nuclear Science & Engineering department at MIT. He presents a straightforward overview of the basic science involved as well as the most promising technologies today. [this video]
Strong rec jabl · 2018-11 · on “Chinese Tokamak reaches over 100M degrees”
As there seems to be quite a lot of confusion in this thread about what this is, here's an excellent video giving an overview of the state of the art in fusion energy research that is understandable by a lay audience: [this video] (somebody posted that video on another recent HN fusion thread)
Strong rec wcarss · 2020-09 · on “Compact nuclear fusion reactor is 'very likely to work,' studies suggest”
My layman's understanding is that recently available (~last 5 years) industrial scale processes to produce rebco tape[1] is the specific advance in superconductor tech that's specifically enabling higher tesla magnetic field strengths from significantly smaller and lighter and easier to manage magnets, so you can get a system that's "powerful enough" to run net posititve at a size that's small enough to be built by a few universities rather than a few dozen nations (i.e. ITER), so the complexity of the engineering project drops from "unimaginable" to "just very high". 1 - [LINK] 2 - really great talk from a few years ago about this from MIT's Plasma Science Fusion Centre: [this video] (really, if
Strong rec fusionbro · 2022-02 · on “Major breakthrough on nuclear fusion energy”
This has been by far the most informative source on Fusion I've seen and gives a clear picture on how to evaluate claims like this. MIT's Pathway to Fusion Energy (IAP 2017) - Zach Hartwig [this video]
Recommends shaqbert · 2017-04 · on “Fusion reactors: Not what they’re cracked up to be”
Mmmh, some of the claims in that article are debunked in this neat video from MIT (though over 1h long): [this video]
Recommends dave_sullivan · 2017-07 · on “Nations collaborating to build world's largest tokamak”
I saw this a while back and thought it was a good summary: [this video] I forget the current best efficiency, but it's getting close.
Recommends bsder · 2017-09 · on “Startup company says it is one step closer to creating nuclear fusion”
Simple: people in the know realize that this technique still needs a bunch of development. This is a good talk about the various variables you need to demonstrate in fusion: [this video]
Recommends Tuna-Fish · 2018-09 · on “ITER Tokamak: First Plasma Through High-Fusion-Gain Deuterium-Tritium Operation”
> Scale is everything for fusion (plasma). No. Q is everything in fusion. Scale is one way to improve Q in a Tokamak. The problem with improving Q by increasing scale is that it makes the reactors uneconomical. A reactor the size of ITER cannot ever be economically viable, even was capable of producing massive amounts of electricity. Luckily, scaling up is not the only way to increase Q. The better way is to use more powerful magnetic fields. Put more eloquently than I can: [this video]