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China's 'artificial sun' smashes 1000-second fusion world record
Published on: 2022-01-03
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China's 'artificial sun' set a new world record on Thursday by running for 1,056 seconds at high plasma temperature, the longest duration for an experimental advanced superconducting tokamak (EAST) fusion energy reactor.
 

EAST already scored a previous record in May, running for 101 seconds at a temperature of 120 million degrees Celsius.
 

China’s “artificial sun” ran for 20 minutes at a whopping 70 million degrees in its latest experiment – five times hotter than the real sun.
 

The latest one came after it was announced last week that a new round of testing would be conducted by the Institute of Plasma Physics under the Chinese Academy of Sciences (ASIPP).
 

The institute, located in Hefei, east China's Anhui Province, has discharged electricity more than 10,000 times since the inauguration of phase II of EAST in 2011.
 

Designed to mimic a fusion reaction like the Sun using hydrogen and deuterium gases as fuel, EAST will provide insights into plasma physics research that is crucial to establish industrial-size reactors to generate clean energy, according to the China National Nuclear Corp.
 

Fusion energy is considered the ideal "ultimate energy" for a carbon-neutral energy future as hydrogen and deuterium gases are abundant in the sea.
 

Now EAST has reached all three targets separately – 1-million-ampere current, 1,000-second duration and 100-million-degree-Celsius temperature. The final mission for the tokamak is to reach all the targets in one try.
 

刷新纪录中国“人造太阳”运行时间突破千秒

2021年的最后一天,中科院合肥物质科学研究院传来消息:12月30日晚,该院等离子体物理研究所有“人造太阳”之称的全超导托卡马克核聚变实验装置(EAST)实现1056秒的长脉冲高参数等离子体运行,这是目前世界上托卡马克装置高温等离子体运行的最长时间。
 

EAST是国家发改委批准立项的国家重大科技基础设施,拥有类似太阳的核聚变反应机制,用来探索核聚变能源应用。
 

核聚变能源的原材料在地球上几乎取之不竭,排放无污染,被视为“终极能源”。实现核聚变发电的两大难点是实现上亿摄氏度点火和稳定长时间约束控制。近年来,在合肥综合性国家科学中心等相关部门支持下,EAST进行一系列性能升级,本轮实验于2021年12月初开始。
 

EAST装置实验运行总负责人龚先祖告诉记者:“2021年上半年,我们把电子温度1.2亿摄氏度等离子体维持了101秒,这次我们是把电子温度近7000万摄氏度的长脉冲高参数等离子体维持了1056秒,注入能量达到1.73吉焦。这是两个不同阶段的目标,千秒等离子体运行的实现,为未来建造稳态的聚变工程堆奠定坚实的科学和实验基础。”
 

实验装置、实验堆、工程堆是瞄准聚变能商用不可逾越的步骤,经过国际社会70余年的共同努力,核聚变研究已从实验装置进入实验堆和工程堆“篇章”。目前,1兆安的等离子体电流、电子温度1亿摄氏度的等离子体、1000秒的连续运行时间,上述三个条件在EAST上已分别实现。

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