Advancing Our HTS Magnet Development: Entering the Next Phase of Coil Testing
- naho yoshimura
- Jul 28
- 1 min read
On July 25th 2025, Helical Fusion team reached a key checkpoint in the development of the high-temperature superconducting (HTS) magnets that will power the world’s first commercially viable steady-state fusion power plant.
Following the success of our first-phase test conducted in February 2024, we have now entered the second phase of testing with a double pancake-shaped coil.
This test coil—specially fabricated by precision engineering partner Metal Technology Co., Ltd.—has been cooled with liquid nitrogen at the National Institute for Fusion Science (NIFS) in preparation for upcoming high-current testing. These tests will evaluate the coil’s electrical performance and durability under stress conditions representative of operational loads.
If successful, these tests will pave the way for phase three: winding the HTS cable into a true helical geometry—an essential step toward scalable magnet integration for our fusion plant.
Our proprietary HTS system is designed not only for top performance but for manufacturability—key to realizing both compact and efficient fusion reactors.
🔗 Read more about the first-phase test: https://lnkd.in/gPZQ_HeH
