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The biggest disadvantage of the stellarator is asserted to be the shaping required for its external magnets. Although most tokamak coils are also now shaped, stellarator coils are typically shaped in three dimensions rather than just two. This is believed to be a decisive qualitative difference. For example, the fusion startup Thea Energy asserts that this added complexity is “prohibitive”. It is not immediately obvious that this should be so.

Fusion is ‘thirty years away and always will be’ – but why? There are basically three ideas: The first option is now treated with a lot of scepticism. Mainstream fusion research has been going for seventy years without being able to gain more power from fusion than it consumes, and magnetic fusion hasn’t even posted … Read more

“The” book on fusion’s problems and prospects has been released, Fusion’s Fading Star. The book is now available on Amazon. About the book: Fusion is the ultimate source of power on earth. Obtaining energy from fusion is the natural continuation of the 20th century’s success in obtaining energy from nuclear fission. It would have many … Read more