Recently, a peer-reviewed paper of HH70’s magnet system entitled “Development and Construction of Magnet System for World’s First Full High Temperature Superconducting Tokamak” was published in the journal Superconductivity. This is our first time introducing Energy Singularity’s work to the academia.

In June 2024, the world’s first full high temperature superconducting (HTS) tokamak has successfully achieved its first plasma operation in Shanghai, China. This tokamak device, HH70, is designed by Energy Singularity in Shanghai, China. The conceptual and engineering design of HH70 was initiated in June 2022, whose major radius (R0) and minor radius (a) are 0.7-0.75m and 0.25-0.31m, respectively. Its toroidal magnetic field B0 at R0=0.7m is 0.6T, the total inductance of the toroidal field (TF) magnet is 6.48H. Over the past two years, Energy Singularity has achieved the first milestone: successfully design, construct and operate an HTS tokamak, and has amassed experience and know‐how about such a first‐of‐its‐kind HTS device. The HH70 tokamak’s magnet system consists of three types of coils: central solenoid (CS) coil, poloidal field (PF) coil, and toroidal field (TF) coil, in which all of the coils are fabricated by HTS conductors. Hence, the HH70 is currently the first tokamak in the world to be fully integrated with HTS coils, marking a groundbreaking advancement in fusion technology.

The world’s first full HTS tokamak, HH70, is constructed in Shanghai, China, and completed its first plasma operation experiment. In this system, there are 26 HTS coils in total: 8 CS coils, 6 PF coils, and 12 TF coils. Thus, Energy Singularity became the only company with an HTS toroidal tokamak device and the capability to conduct its operation experiments. Moreover, the successful development of the HH70 has validated the application of HTS technology in tokamak devices.

https://doi.org/10.1016/j.supcon.2024.100137