【科技日报】BEST装置首个关键部件杜瓦底座成功落位装配

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].