Core Insights - The compact fusion energy experimental device "Kua Fu Qi Ming" (BEST) in Hefei, Anhui Province, is set to demonstrate the burning of plasma such as deuterium and tritium, aiming to showcase fusion energy generation [1][2] - The successful development and delivery of the key component, the Dewar base, marks a significant milestone in the installation of major components for the device [1][2] Group 1 - The Dewar base is the first large vacuum component of the compact fusion energy experimental device, with a complex design and hundreds of interfaces [1] - The Dewar base has a diameter of approximately 18 meters, a height of about 5 meters, and weighs over 400 tons, making it the heaviest component of the main system [1] - The installation precision of the Dewar base is critical, with surface level differences needing to be controlled within 15 millimeters and positional deviations not exceeding ±2 millimeters [1] Group 2 - The completion of the Dewar base installation signifies the upcoming installation of other important components such as magnets and vacuum chambers [2] - The construction of the compact fusion energy experimental device is based on years of research on the "East Super Ring" and breakthroughs in technology and engineering during the development of the "Kua Fu" facility [2] - The device aims to provide an integrated environment close to future fusion reactor parameters, supporting the development of key technologies for fusion energy applications [2]

Core Insights - The compact fusion energy experimental device "Kua Fu Qi Ming" (BEST) in Hefei, Anhui, is progressing towards demonstrating plasma "burning" with deuterium and tritium, potentially paving the way for fusion energy generation [1][2] - The successful installation of the key component, the Dewar base, marks the beginning of the installation of major components such as magnets and vacuum chambers [2] Group 1 - The compact fusion energy experimental device has a height of approximately 20 meters and a diameter of about 18 meters, designed to meet biological safety and physical protection requirements [1] - The Dewar base is the heaviest component of the main system, weighing over 400 tons, with a complex design and hundreds of interfaces [1] - The installation precision of the Dewar base is critical, with a surface level difference controlled within 15 millimeters and a positional deviation not exceeding ±2 millimeters [1] Group 2 - The construction of the compact fusion energy experimental device is based on years of research on the "East Super Ring" and breakthroughs in key systems during the development of the fusion reactor main system "Kua Fu" [2] - The device aims to provide an integrated environment close to future fusion reactor parameters, supporting the development of key technologies for fusion energy applications, including superconducting strong magnetic fields and tritium production [2]

Core Viewpoint - The company has successfully completed the assembly of the first key component, the Dewar base, for its compact fusion energy experimental device (BEST), marking significant progress in the project development [2] Group 1 - The Dewar base is a critical component in the construction of the BEST project [2] - The successful assembly of the Dewar base indicates a major advancement in the company's efforts in fusion energy technology [2]

Core Insights - The successful installation of the Dewar base, a critical component of the compact fusion energy experimental device (BEST), marks a significant breakthrough in the project's construction [1][2]. Group 1: Project Overview - The Dewar base is the first large vacuum component of the BEST main machine, with a complex design and hundreds of interfaces [1]. - It has a diameter of approximately 18 meters, a height of about 5 meters, and weighs over 400 tons, making it the heaviest component in the BEST system and the largest vacuum component in China's fusion field [1]. - The Dewar base supports nearly 7,000 tons and its installation precision is crucial for the stability and safety of the entire project [1]. Group 2: Technical Challenges and Solutions - The project team faced significant challenges, including high-precision forming and welding, millimeter-level deformation control, and high vacuum sealing [1]. - The installation required a high lifting precision, with surface level differences controlled within 15 millimeters and positional deviations not exceeding ±2 millimeters [1]. - The team developed a specialized lifting system and utilized multi-station laser tracking to monitor reference points and dynamically adjust the lifting posture, achieving millimeter-level precision in the installation [1]. Group 3: Future Plans - The successful delivery and installation of the Dewar base lays a solid foundation for the installation and debugging of subsequent core components of the BEST project [2]. - The BEST team aims to continue promoting the installation work of the device components to ensure the project's construction goals are met on time and with high quality [2].

中国科学院合肥物质科学研究院等离子体物理研究所研究员杨庆喜介绍，杜瓦底座的吊装精度高，表面 水平高差需控制在15毫米以内，落位位置偏差不得超过正负2毫米；作业空间极度狭小，底座外边缘与 主机坑屏蔽墙的最小间隙不足100毫米。面对这些挑战，项目团队连续奋战、攻坚克难，自主研发了专 用吊具系统，通过均衡梁、吊梁、提升适配器及花篮螺丝等组件的协同作用，精细调节吊装水平度。同 时，他们采用多站激光跟踪仪实时监测基准点，动态调整吊装姿态，最终实现杜瓦底座的毫米级精准落 位安装。 杜瓦底座的制造交付和落位装配，为BEST后续核心部件的安装和调试奠定了坚实基础。"接下来， BEST团队将发扬全超导托卡马克大科学团队精神，全力以赴推进装置部件安装工作，确保BEST装置建 设目标按期高质量完成。"杨庆喜表示。 （文章来源：科技日报） 近日，紧凑型聚变能实验装置（BEST）首个关键部件杜瓦底座成功落位装配仪式在安徽省合肥市举 行，标志着BEST项目建设取得关键性突破。 据介绍，杜瓦底座是BEST主机的首个真空大部件，设计工况复杂，接口达数百个。其结构尺寸大，直 径约18米，高度约5米，总重量400余吨，是BEST主机系统中最重的 ...

Core Viewpoint - The successful installation of the Dewar base marks a significant milestone in the construction of the BEST project, advancing the main engineering phase and accelerating the progress of component manufacturing and installation [1][5]. Group 1: Installation Details - The Dewar base is the first vacuum large component of the BEST device, with a diameter of approximately 18 meters, a height of about 5 meters, and a total weight exceeding 400 tons [1]. - The installation precision of the Dewar base is critical, requiring a surface level difference to be controlled within 15 millimeters and a positional deviation not to exceed ±2 millimeters [3]. - The installation space is extremely limited, with a minimum gap of less than 100 millimeters between the outer edge of the base and the shielding wall of the main pit [3]. Group 2: Technical Achievements - The Dewar base was developed by a project team led by the Hefei Institute of Plasma Physics, which overcame key technologies such as high-precision forming and welding, millimeter-level deformation control, and high vacuum sealing [5]. - The successful manufacturing and installation of the Dewar base lays a solid foundation for the subsequent installation and debugging of core components of the BEST device [5]. Group 3: Project Overview - The BEST (Burning Experimental Superconducting Tokamak) is a compact fusion energy experimental device that aims to validate the feasibility of fusion energy generation in a real fuel environment by 2025 [6]. - The project is expected to be completed within two years, with the goal of demonstrating fusion energy generation by 2025 and potentially lighting the first lamp with nuclear fusion by 2030 [6].

◎ 科技日报记者 洪敬谱 10月1日，紧凑型聚变能实验装置（BEST）首个关键部件杜瓦底座成功落位装配仪式在安徽合肥举行， 标志着BEST项目建设取得关键性突破。 来源：科技日报 项目团队相继攻克了高精度成型和焊接、毫米级形变控制、高真空密封等关键技术，成功研制出杜瓦底 座部件。其制造交付和落位装配，为BEST装置后续核心部件的安装和调试奠定了坚实基础。 来源：科技日报 供图：中国科学院合肥物质科学研究院 海报制作：杨凯 王璠 杜瓦底座是BEST装置主机的首个真空大部件，设计工况复杂，接口数百个。结构尺寸大，直径约18 米，高度约5米，总重量400余吨，是BEST主机系统中最重的部件，也是国内聚变领域最大的真空部 件。该部件承载着BEST装置近七千吨重量支撑和绝热功能，其安装精度直接关系到整个工程的稳定性 和安全性。 ...

今天（1日），位于合肥的紧凑型聚变能实验装置BEST项目建设取得关键突破。BEST装置主机关键部件——杜瓦底座研制成功并顺利完成交付，成功精准 落位安装在BEST装置主机大厅内。作为首个进驻主机大厅的关键部件，杜瓦底座的落位安装标志着BEST项目主体工程建设步入新阶段，部件研制和工程安 装将加快进度。 杜瓦底座是BEST装置主机的首个真空大部件，也是国内聚变领域最大的真空部件。该底座直径约18米，高度约5米，总重量400余吨，是BEST主机系统中最 重的部件，将位于整个BEST主机的最底端，用来承载总重约6700吨的主机。 紧凑型聚变能实验装置（Burning Experimental Superconducting Tokamak，BEST）是燃烧等离子体物理实验装置，采用紧凑高场超导托卡马克技术路线，运 用高性能超导磁体、高功率中性束加热、氘氚聚变燃料等新技术，将首次在国际上验证聚变可在真实燃料环境下实现净输出能量，演示核聚变发电。2025年 5月，BEST的总装工作正式启动，预计将在两年后建成，并在全球范围内首次实现聚变能发电演示。到2030年，我们有望通过核聚变点亮第一盏灯。 （总台央视记者 帅俊全 ...

Core Insights - The installation of the first key component, the Dewar base, for the compact fusion energy experimental device (BEST) in Hefei, Anhui, marks a new phase in the project's construction, accelerating component development and engineering installation [1][3] - Fusion energy, regarded as the "ultimate energy," simulates the nuclear fusion reactions occurring in the sun, aiming to demonstrate plasma "burning" of deuterium and tritium, potentially achieving the world's first fusion energy generation [1] - The Dewar base, weighing over 400 tons and measuring approximately 18 meters in diameter and 5 meters in height, is the heaviest single component in the BEST device and the largest vacuum component in China's fusion field to date [3][5] Technical Achievements - The installation of the Dewar base required high precision to ensure the future stability of the device, with surface level differences controlled within 15 millimeters and positional deviations not exceeding ±2 millimeters [5] - The project team developed a specialized lifting system and utilized laser tracking technology for real-time monitoring and adjustments, achieving millimeter-level precision during installation [5] - Following the successful installation of the Dewar base, core components of the main device will be installed sequentially, with the BEST expected to be completed by the end of 2027 [5] Strategic Importance - The steady progress of the BEST construction is of significant strategic importance for China to lead in cutting-edge fusion science research, validate key technologies for future fusion reactors, and continue to guide international developments in fusion energy [5]