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Physics

Hybrid design could make nuclear fusion reactors more efficient

Two types of fusion reactor called tokamaks and stellarators both have drawbacks – but a new design combining parts from both could offer the best of both worlds

By Alex Wilkins

14 June 2024

Diagram of the hybrid reactor showing a ring of plasma (cyan) with “banana coils” running through the centre

S. A. Henneberg and G. G. Plunk/Max Planck Institute for Plasma Physics

A hybrid of two popular nuclear fusion reactor designs could lead to more efficient power plants.

Magnetic confinement fusion reactors use magnetic fields to squeeze a cloud of charged ions, called a plasma, into a tiny volume, which increases the chances of atoms fusing together and releasing energy.

There are two main types of reactor that confine…

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