Experimental setup and site preparation

After intense construction, the technological transformation project of the Xinghuan Fusion Energy experimental base has achieved a phased milestone. The site preparation for the experimental setup has been largely completed, and the spherical tokamak core device along with its supporting equipment and components have been delivered to the site.

Install equipment, test vacuum, measure positions

The installation of the SUNIST-2 device is progressing smoothly and efficiently. Key milestones, including the installation of the device and magnet base, layout of vacuum chamber baking heating wires, vacuum testing, PF coil installation, and positional adjustments, have been successively completed. The overall assembly of the device has been successfully finalized.

Assemble the TF power supply and test the PF/CS power supplies

With the completion of the main device installation, the project has now entered the stage of power supply assembly and debugging. The assembly of the TF power supply and the testing of the CS power supply are being carried out simultaneously. Outstanding results have been achieved in the PF power supply testing, demonstrating that it is ready for mass production and deployment.

Diagnostic equipment installation, auxiliary facilities installation, and discharge preparation

Following the completion of TF/CS/PF power supply bracket installation and power supply assembly, the fully self-developed SUNIST-2 power supply system of Xinghuan Fusion Energy is now ready for operation and will proceed with integrated commissioning with the coils. Meanwhile, magnetic diagnostics inside and outside the vacuum chamber, the THz interferometer, and the optical testing cleanroom have been successively deployed. All necessary conditions have been prepared for the first plasma experiment debugging.

Power supply testing, subsystem testing, and integrated commissioning

Based on the operational characteristics of the toroidal magnets, Xinghuan Fusion Energy has adopted a modular design, integrating energy storage, inversion, and control circuits into a single kA-level power module. By stacking these modules in arrays, the system achieves a 100kA-level current output. The power supply is equipped with a comprehensive status monitoring system and full protective measures, offering excellent current regulation capability. Moreover, its high scalability allows for rapid construction of various power supply topologies and current levels using this modular platform.

Achieve first plasma and continuously upgrade the device.

SUNIST-2, designed by Tsinghua University and jointly constructed by Xinghuan Fusion Energy and Tsinghua University, recently achieved successful operation, obtaining a plasma current of 100 kiloamperes and smoothly reaching its initial goals.

Magnetic Reconnection Heating Experiment Attempt

The team from Xinghuan Energy and Tsinghua University has successfully achieved double-ring plasma formation and magnetic reconnection heating on the SUNIST-2 spherical tokamak, with preliminary observations indicating significant plasma heating effects. new_line bold Installation of the first wall and deployment of key diagnostic systems new_line Following the successive completion of the design and installation of the graphite tile first wall, the deployment and testing of the MC power supply, the commissioning and installation of the TS diagnostic system, and the offline testing of the advanced wall conditioning system, SUNIST-2 has met the conditions for high-parameter magnetic reconnection heating. The device successfully achieved double-loop plasma breakdown and magnetic reconnection compression experiments, with preliminary observations indicating significant heating effects.

Development of a D-Shaped High-Temperature Superconducting Magnet Prototype

Startorus Fusion, in collaboration with Tsinghua University and utilizing high-temperature superconducting (HTS) tapes from Shanghai Superconductor Technology Co., Ltd., has successfully developed a D-shaped HTS magnet prototype to meet the demands of future fusion reactors. The magnet achieved a maximum internal magnetic field strength of 18 T, which is the highest reported field strength for a D-shaped magnet in China to date. This 18 T field strength fully satisfies the toroidal field requirements for spherical tokamak devices to achieve fusion conditions. The successful operation of this magnet has laid a solid foundation for the company's next-generation device design. new_line bold Achieved stable operation of the world's first repetitive magnetic reconnection technology scheme. new_line Startorus Fusion has successfully achieved plasma initiation heated by magnetic reconnection twice within a single discharge cycle. The realization of magnetic reconnection heating and repetitive reoperation demonstrates that the core operational scheme of the SUNIST-2 device, jointly built by the company and Tsinghua University, has been fully engineered and implemented at Startorus Fusion. Both active magnetic reconnection heating and repetitive reconnection operation represent the first such achievements in China, while also laying a solid foundation for the successful operation of the next-generation CTRFR-1 device designed to achieve fusion conditions.

Startorus Fusion is about to start the construction of the negative triangular spherical tokamak NTST

After the initial engineering verification unit SUNIST-2 was successfully completed and put into operation, and met the main design indicators, Xinghuan Energy is about to start the construction of the Negative triangular Spherical Tokamak NTST (negative Triangularity Spherical Tokamak). This device is expected to become the world's first negative triangular spherical tokamak, or even the world's first negative triangular tokamak.

Mastering the Cooling Technology of 20K Cold Nitrogen Cycle

Mastering the Cooling Technology of 20K Cold Nitrogen Cycle

EPIC, which is self-developed and newly launched；LIBS will expand alloy monitoring and optimize portability；LIBS enables 304 and 316 stainless steel identification

Achieved significant advancements in high-temperature superconducting (HTS) magnet technology.

Startorus Fusion continues to invest in the high-temperature superconducting (HTS) direction, achieving significant progress in HTS magnet scheme design and multi-physics coupling simulation, D-shaped magnet fabrication processes and experimental testing, as well as the development of high-current current lead joints.

SUNIST-2 device pushes the limits toward highest parameters.

Following lithium wall conditioning in the vacuum chamber, a high vacuum condition was achieved, enabling the SUNIST-2 device to push toward its highest parameters with a plasma current approaching 500 kA. Utilizing independently developed control system hardware and feedback algorithms, SUNIST-2 achieved a long-pulse flat-top discharge lasting 200 ms for the first time, demonstrating its capability as a high-level plasma experimental platform.

EPIC has undergone four generations of upgrades and iterations and is now newly launched

EPIC's fourth generation has achieved high-precision data acquisition at the microvolt level, featuring 16 data acquisition channels. It can simultaneously collect voltage, temperature, Hall signals, strain, and 4-20mA current signals. new_line bold LIBS enables the identification of 304 and 316 stainless steel, which will expand alloy detection and optimize portability new_line Under certain experimental conditions, Startorus Fusion has achieved the identification of 304 and 316 stainless steel within the visible light range of 400-700nm. It will continue to iterate and optimize towards portable products in the future

The full-size high-temperature superconducting coil of Startorus Fusion has completed the full-process technology verification

The full-size high-temperature superconducting TF coil and CS coil independently developed by Startorus Fusion successfully completed a series of key tests in a liquid nitrogen cooling environment, covering core test items such as rated current, ultimate current, overcurrent loss and overcurrent loss, and undercooling and overcurrent loss. Test data shows that the coil performs exceptionally well in key indicators such as current-carrying capacity, stability under extreme working conditions, and self-protection capability in case of failure, meeting the expected design standards. This marks an important progress for Star Ring Energy in the development of fusion-grade device magnets. Next, Star Ring Energy will further carry out 20 K low-temperature tests and other work, taking a crucial step towards the rapid and economical realization of fusion energy.

Startorus Fusion has made significant progress in the fields of high-field side feeding, plasma control, and the integration of "AI+ nuclear fusion" technologies

Startorus Fusion has initially mastered the high-field side feeding technology. The compact ultrasonic molecular beam intake valve independently developed by it can adapt to the narrow high-field side space of spherical tokamaks, increasing the plasma feeding efficiency by three times compared to the original. Meanwhile, this technology, in combination with PCS configuration control, has successfully achieved rapid feedforward density control. new_line Startorus Fusion has made significant progress in the field of plasma magnetic confinement control technology. Currently, it has initially acquired isoflux control capabilities, significantly enhancing the precision of plasma shape control and achieving a leap from 0-dimensional global parameter control to 1-dimensional fine distributed control. This provides key technical support for the high-performance operation of future fusion reactors. new_line The intelligent monitoring system for plasma diagnostic data developed by Transwarp Energy, relying on a neural network model constructed with deep learning algorithms, has achieved real-time automated monitoring and early warning of abnormal data. This achievement marks a further breakthrough for Starring Energy in the field of "AI + nuclear fusion" technology integration, providing strong support for the stable operation of controllable nuclear fusion devices.