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>However, turbulence increases with stronger magnetic field gradients Mmm, this isn't right. The stronger magnetic field reduces turbulence, it's the gradient

>However, turbulence increases with stronger magnetic field gradients Mmm, this isn't right. The stronger magnetic field reduces turbulence, it's the gradient of the pressure that generates turbulence. As best as anyone can tell, SPARC should be able to get Q~10 without any miracles involved -- the engineering rules of thumb and the advanced simulations all say the same. https://www.cambridge.org/core/journals/journal-of-plasma-physics/article/status-of-the-sparc-physics-basis/B21625B93C0654B955B776566C96DF6B https://www.cambridge.org/core/journals/journal-of-plasma-ph...

sigmoid10 5y ago
>The stronger magnetic field reduces turbulence That's why I specifically said field gradients - i.e. the thing that gets larger when you have a stronger field in a smaller volume. >it's the gradient of the pressure that generates turbulence How exactly do you think that pressure is created? Also, that link you provided is an editorial from one of the directors behind SPARC. If you want an objective analysis that is not geered towards possible investors, you need to look elsewhere. FYI, anyone selling you Q~10 designs without a considerable theoretical breakthrough is almost certainly conning you. If you don't believe me just look at how Lockheed's compact fusion reactor panned out. Stronger magnets are not some kind of miracle solution that will enable fusion tomorrow.