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Technical LibraryGlossary of Fusion & Plasma Terms
Glossary

Vacuum Pumping Speed

How fast the vacuum system removes gas and helium ash.

Glossary of Fusion & Plasma TermsUpdated 2026-08-11

Pumping speed sets how quickly exhaust gas and helium ash are removed, controlling density and purity. Cryopumps provide the high speeds fusion vessels need.

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Content reviewed August 2026 · design-and-simulation stage