用于锶原子光钟永磁体塞曼减速器设计

Designing a permanent Zeeman slower for Sr optical clock

研究用于锶原子光钟的永磁体塞曼减速器,根据实验条件计算88Sr原子束塞曼减速器的磁场分布,将起始速度为410 m/s的锶原子减速至50 m/s,经过横向磁场的原子通量为7.9×105。基于永磁体制作的塞曼减速器,可靠性高、体积小、重量轻,磁场分布可调,而且无需高电流和水冷装置,实现了永磁体塞曼减速器的小型化。

Transverse Zeeman slower composed of an array of permanent magnets is investigated for Sr optical clock. We calculated the magnetic field distribution of 88 Sr atoms based on experimental condition, achieving a reduction of the velocity of atoms from 410 m/s to 50 m/s. The atoms flux through the transverse magnetic field was 7.9×105. Such permanent Zeeman slower needs no high currents or water cooling and the spatial distribution of its magnetic field can be adjusted. Another advantage of this Zeeman slower is its small size and high reliability. Therefore, a miniature Zeeman slower can be attained.