Story perspectives

UK's MAST Upgrade Achieves Breakthrough in Fusion Stability

10/23/2025

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Summary

Story summary

The United Kingdom's MAST Upgrade tokamak achieved the first suppression of Edge Localised Modes (ELMs) in a spherical tokamak during its fourth campaign, using Resonant Magnetic Perturbation (RMP) coils.
James Harrison of the United Kingdom Atomic Energy Authority emphasized the achievement's importance for future power plants like STEP.
The breakthrough addresses longstanding challenges in sustaining plasma stability in fusion devices.
The result advances the pursuit of sustainable nuclear fusion energy.

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Story summary

The United Kingdom's MAST Upgrade tokamak achieved the first suppression of Edge Localised Modes (ELMs) in a spherical tokamak during its fourth campaign, using Resonant Magnetic Perturbation (RMP) coils.
James Harrison of the United Kingdom Atomic Energy Authority emphasized the achievement's importance for future power plants like STEP.
The breakthrough addresses longstanding challenges in sustaining plasma stability in fusion devices.
The result advances the pursuit of sustainable nuclear fusion energy.