The Experimental Advanced Superconducting Tokamak achieved a remarkable scientific milestone by maintaining steady-state high-confinement plasma operation for an impressive 1,066 seconds. Credit: HFIPS
China’s EAST project has set a new global record by maintaining a high-confinement plasma state for over 17 minutes, paving the way for future clean energy solutions by mimicking the sun’s fusion process.
China’s Experimental Advanced Superconducting Tokamak (EAST), also known as the “artificial sun,” has set a new world record by sustaining high-confinement plasma for an impressive 1,066 seconds. This achievement, reached on January 20, marks a major step forward in the quest to develop fusion power as a clean and limitless energy source.
The 1,066-second milestone represents a significant leap in fusion research. It was accomplished by the Institute of Plasma Physics (ASIPP) at the Hefei Institutes of Physical Science (HFIPS), part of the Chinese Academy of Sciences. This new record greatly exceeds the previous world record of 403 seconds, also set by EAST in 2023.
A Step Towards Unlimited Clean Energy
The ultimate goal of developing an artificial sun is to replicate the nuclear fusion processes that occur in the sun, providing humanity with a limitless and clean energy source, and enabling exploration beyond our solar system.
Scientists worldwide have dedicated over 70 years to this ambitious goal. However, generating electricity from a nuclear fusion device involves overcoming key challenges, including reaching temperatures exceeding 100 million degrees Celsius, maintaining stable long-term operation, and ensuring precise control of the fusion process.
EAST maintained a steady-state high-confinement plasma operation for 1,066 seconds on January 20, 2025. Credit: HFIPS
Record-Setting Performance Enhancements
“A fusion device must achieve stable operation at high efficiency for thousands of seconds to enable the self-sustaining circulation of plasma, which is essential for the continuous power generation of future fusion plants,” said SONG Yuntao, ASIPP director and also vice president of HFIPS. He said that the recent record is monumental, marking a critical step toward realizing a functional fusion reactor.
According to GONG Xianzu, head of the EAST Physics and Experimental Operations division, several systems of the EAST device have been upgraded since the last round of experiments. For example, the heating system, which previously operated at the equivalent power of nearly 70,000 household microwave ovens, has now doubled its power output while maintaining stability and continuity.
Supporting International Fusion Research
Since its inception in 2006, EAST has served as an open testing platform for both Chinese and international scientists to conduct fusion-related experiments and research.
China officially joined the International Thermonuclear Experimental Reactor (ITER) program in 2006 as its seventh member. Under the agreement, China is responsible for approximately 9 percent of the project’s construction and operation, with ASIPP serving as the primary institution for the Chinese mission.
ITER, currently under construction in southern France, is set to become the world’s largest magnetic confinement plasma physics experiment and the largest experimental tokamak nuclear fusion reactor upon completion.
In recent years, EAST has consistently achieved groundbreaking advancements in high-confinement mode, a fundamental operational mode for experimental fusion reactors like ITER and the future China Fusion Engineering Test Reactor (CFETR). These accomplishments provide invaluable insights and references for the global development of fusion reactors.
“We hope to expand international collaboration via EAST and bring fusion energy into practical use for humanity,” said SONG.
In Hefei, Anhui Province, China, where EAST is located, a new generation of experimental fusion research facilities is currently under construction. These facilities aim to further accelerate the development and application of fusion energy.
