The Foundation for the SPARC Fusion Energy Machine Is Here

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This month, Commonwealth Fusion Systems began a new chapter of fusion energy progress: assembling the SPARC tokamak. We can now see the beginnings of the actual machine we’ll use to prove the commercial viability of our technology.

In March, we installed the SPARC tokamak’s first element, a disc-shaped stainless steel construction called the cryostat base. We rolled it in on tracks, lowered it into place with a crane, leveled it, and fixed it in place with bolts and grout. It’s now nestled into its home in Devens, Massachusetts, surrounded by systems to power and cool it.

Along with its job to support SPARC’s mass, the 75-ton base acts as a conduit for fundamental systems like cryogenics and fuel lines that connect to the machine. It's also a vital boundary protecting the magnets inside SPARC from the warmer outside environment so they function at full strength.

The cryostat helps keep SPARC’s magnets cold the same way a Thermos flask keeps your drink at the right temperature: It’s a container with no air between its walls. That air could carry heat from the outside to the inside. SPARC’s cryostat is designed to be so well sealed that only a cubic centimeter of gas could leak over 30 years.

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#PowerMoves #SPARC #FusionEnergy
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Commonwealth Fusion Systems is the world’s leading and largest private fusion company. The company’s marquee fusion project, SPARC, will generate net energy, paving the way for limitless carbon-free energy through the world's first grid-relevant fusion energy power plant, ARC. The company has raised more than $2 billion in capital since it was founded in 2018.

Follow along as we push forward to delivering fusion energy to power the world’s energy transition. #fusionenergy

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