PORRITTINC
( LAYTON, UT )
SPECIFICATION · BALANCE OF PLANT

Vacuum systems
specification.

Staged roughing, turbomolecular, and cryosorption pumping holding the torus at ultra-high vacuum and the cryostat at insulating vacuum, with regeneration sequenced for continuous operation.

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DESIGN TARGET · NOT MEASURED PERFORMANCE

Figures on this page are engineering design targets and reference-architecture values, not measured results from operating hardware. They state what the design is being engineered to achieve. Verified performance data will replace them as systems are built and tested. Nothing here should be relied upon as a performance warranty.

Design basis
STAGE 1

Mechanical roughing

Takes volumes from atmosphere to turbo crossover pressure. Sized so pump-down does not dominate the return-to-service schedule.

STAGE 2

Turbomolecular

Carries the system from crossover into high vacuum and handles continuous gas load during operation.

STAGE 3

Cryosorption

Provides ultra-high vacuum capacity. Cryopumps saturate and require regeneration, which is why bank sequencing matters.

SEQUENCING

Continuous pumping

The cryopump bank is regenerated on a rotating schedule so net pumping speed never falls to zero during a long burn.

Design targets
1e-8 mbar
Base pressure target
Cryopump bank
24/7
Continuous pumping
2
Vacuum boundaries
Interfaces

Torus and cryostat vacuum boundaries; exhaust routes to the tritium plant. Leak detection, pressure trending, and regeneration state are supervised centrally. Vacuum loss is an interlocked condition with defined protective response.

Discuss the details.

Specifications evolve as the design matures. Contact us for current status and integration requirements.

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