CFS installs SPARC's 75-tonne cryostat base, starting assembly of the tokamak in Devens

Commonwealth Fusion Systems/SPARC

Commonwealth Fusion Systems installed SPARC's 75-tonne, 24-foot-wide stainless steel cryostat base at its Devens, Massachusetts site, marking the transition from component manufacturing to active tokamak assembly. The cryostat base provides structural support for the ~1,000-tonne machine and absorbs neutrons from fusion reactions; magnets, vacuum vessel and central solenoid follow.

• Cryostat base: 75 tonnes, over 7 metres diameter, supports ~1,000-tonne tokamak.
• Base absorbs neutrons and contains conduits for helium coolant, magnet power, sensors.
• Installation marks shift from parts manufacturing to tokamak assembly phase.
• Toroidal and poloidal field magnets, vacuum vessel, central solenoid to follow.