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Technical Library › Glossary of Fusion & Plasma Terms
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Hyperion breeder · design render
Hyperion breeder · design render · © 2026 KFE

Alfvén Speed

REBCO critical current versus field — the HTS magnet basis.
REBCO critical current versus field — the HTS magnet basis. canon 2026-08-27 · © 2026 KFE

The speed of magnetic waves in a plasma, set by field and density.

Glossary of Fusion & Plasma TermsUpdated 2026-08-11

The Alfvén speed is how fast magnetohydrodynamic waves travel along field lines, rising with field and falling with density. It sets the timescale of ideal instabilities and Alfvén-eigenmode frequencies.

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Alfvén Wave →Alfvén Time →Alfvén Eigenmodes →
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