Cathode High-Voltage Power Supply for CFQS Device ECRH System Manufactured by CNNC Tongchuang Successfully Shipped

On August 3, the cathode high-voltage power supply for the Electron Cyclotron Resonance Heating (ECRH) system of China's first Quasi-Axisymmetric Stellarator (CFQS) device, manufactured by CNNC Tongchuang (Chengdu) Technology Co., Ltd., successfully passed factory acceptance and was officially shipped.

The CFQS device is a major scientific and technological infrastructure project of Sichuan Province. The device adopts an advanced quasi-axisymmetric magnetic field configuration, combining the advantages of high confinement performance and steady-state operation. Under low-parameter operating conditions, the CFQS test platform confirmed that the "quasi-axisymmetric" magnetic field configuration can effectively reduce neoclassical transport losses in plasma and improve plasma confinement, marking the first international experimental verification of the superiority of the "quasi-axisymmetric" magnetic field configuration. Next, the CFQS stellarator device will enter the high-parameter physics experiment phase.

The cathode high-voltage power supply is the core equipment of the ECRH system on the CFQS device, primarily used to provide stable, precise, and controllable accelerating high voltage for the gyrotron. Under the overall planning and coordinated promotion of the project headquarters, all participating research units worked closely together, defining power supply performance indicators and safety protection requirements based on the operating conditions of the ECRH system. Leveraging the technical expertise of the Southwestern Institute of Physics in fusion special power supplies, CNNC Tongchuang fully utilized its advantages in engineering development, focusing on overcoming key technologies such as stable high-voltage output, rapid fault shutdown, and multi-system interlock protection. Tests showed that the power supply operates stably with precise control and reliable protection, with all performance indicators meeting design requirements, laying a solid foundation for subsequent on-site installation and system commissioning.

CNNC Tongchuang (Chengdu) Technology Co., Ltd. is a national high-tech enterprise deeply engaged in the field of nuclear fusion and plasma equipment. Relying on decades of fusion research expertise from the Southwestern Institute of Physics, the company focuses on the engineering development of special high-voltage power supplies and plasma equipment. The successful development of this ECRH heating equipment is another practice of the company in promoting the engineering application of fusion research achievements. In the next step, CNNC Tongchuang will continue to provide strong support for the operation of the CFQS device ECRH system by carrying out on-site technical coordination, installation and commissioning, and joint debugging tests in accordance with the overall project deployment, thereby facilitating the smooth conduct of quasi-axisymmetric stellarator plasma physics experiments.