Virtual Tour of the CFS Commercial Fusion Campus (April 2026)

It’s time for a new inside look at the SPARC facility, where we're about 75% through building our machine to demonstrate fusion energy’s commercial viability. In this tour, Alex Creely, Chief Engineer of ARC Conceptual Design, SPARC expert, and your tour guide shows the tremendous progress we've made over the past 9 months since the last virtual tour.

Here’s what else you'll see in this video:

• The neutron lab, where we’ll house instrumentation to measure the neutrons that deuterium-tritium fusion will produce once SPARC is up and running

• Tokamak hall, where we now have both halves of our vacuum vessel and the first TF magnets on the beefy orange temporary stands we use to assemble the tokamak

• Assembly hall, where we clean and prep SPARC components before we bring them into the tokamak hall

• The RF building, where we generate and deliver the radio-frequency power that's essential to heating up SPARC's plasma to the seriously hot temperatures necessary for fusion — around 100 million degrees Celsius

• The power building, where we house electronics that draw and store the energy required to fire up SPARC’s magnets for operation

• The cryogenic yard, where we store the helium used to cool down SPARC’s superconducting magnets to a very chilly 8 Kelvin (about -265°C or -445°F)

• The utility building and cryogenic plant, which cools that helium and draws heat from SPARC when we’re making fusion happen

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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.