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Technical LibraryGlossary of Fusion & Plasma Terms
Glossary

Magnet Cold Mass

The assembly of coils and structure held at cryogenic temperature.

Glossary of Fusion & Plasma TermsUpdated 2026-08-11

The cold mass is everything kept cold — the superconducting coils and their supporting structure — insulated by the cryostat and cooled by the cryoplant. Its thermal mass and heat leaks set the refrigeration load.

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Content reviewed August 2026 · design-and-simulation stage