Bell S C, Junker M, Jasperse M, Turner L D, Lin Y-J, Spielman I B, Scholten R E
ARC Centre of Excellence for Coherent X-ray Science, School of Physics, The University of Melbourne, Victoria 3010, Australia.
Rev Sci Instrum. 2010 Jan;81(1):013105. doi: 10.1063/1.3276712.
We describe a simple slow atom source for loading a rubidium magneto-optical trap. The source includes an effusive oven with a long heated collimation tube. Almost all components are standard vacuum parts. The heating elements and thermocouples are external to the vacuum, protecting them from the hostile hot alkali environment and allowing repair without breaking vacuum. The thermal source is followed by a Zeeman slower with a single-layer coil of variable winding pitch. The single-layer design is simple to construct and has low inductance which allows for rapid switching of the magnetic field. The coil pitch was determined by fitting the analytic form of the magnetic field for a variable winding pitch to the desired magnetic field profile required to slow atoms. The measured magnetic field for the constructed coil is in excellent agreement with the desired field. The source produces atoms at 35 m/s with a flux up to 2 x 10(10) cm(-2) s(-1) at 200 degrees C.
我们描述了一种用于加载铷磁光阱的简单慢原子源。该源包括一个带有长加热准直管的喷射炉。几乎所有组件都是标准真空部件。加热元件和热电偶位于真空外部，保护它们免受恶劣的热碱环境影响，并允许在不破坏真空的情况下进行维修。热原子源后面是一个具有可变绕组间距单层线圈的塞曼减速器。单层设计易于构建且电感低，这允许快速切换磁场。通过将可变绕组间距的磁场解析形式拟合到减慢原子所需的期望磁场分布来确定线圈间距。所构建线圈的测量磁场与期望磁场非常吻合。该源在200℃时产生速度为35m/s的原子，通量高达2×10(10)cm(-2)s(-1)。
