Princeton University spin-off Thea Energy has raised $100 million in a Series B funding round led by the U.S. Innovative Technology Fund. This investment places the company among the best-funded fusion startups globally and significantly boosts its prospects for creating a commercial reactor. The new funds will be used to scale the production of small-scale magnets and begin construction of a demonstration device called Eos next year. This is reported by Techcrunch.com .
The core of Thea Energy's technology is a unique magnetic system. While most fusion reactors use massive, complex magnets to confine plasma, Thea employs an array of rectangular magnets that can be individually tuned. The company compares this to pixels on a computer monitor: by using software to control each "pixel" magnet, the necessary magnetic field can be shaped inside the reactor. This approach significantly simplifies the construction of stellarator-type reactors.
Stellarators are known for their ability to maintain stable plasma, but their complex, twisted shapes drive up manufacturing costs. Thea Energy aims to create complex-shaped fields by software-controlling dozens of simple magnets. Even if the magnets are slightly misaligned, specialized software can compensate for the error, simplifying the assembly process.
The company plans to complete the Eos demonstration reactor by 2030 and launch a commercial version called Helios in 2034. These timelines align with the plans of major competitors like Commonwealth Fusion Systems. Currently, the startup is successfully testing dozens of prototypes of its magnets at its laboratory in Jersey City.
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