We present the design of a Zeeman slower for calcium atoms using permanent magnets instead of more traditional electromagnets and the novel technique of 3D printing to create a very robust and flexible structure for these magnets. Zeeman slowers are ideal tools to slow atoms from several hundreds of meters per second to just a few tens of meters per second. These slower atoms can then easily be trapped in a magneto-optical trap, making Zeeman slowers a very valuable tool in many cold atom labs. The use of permanent magnets and 3D printing results in a highly stable and robust slower that is suitable for undergraduate laboratories. In our design, we arranged 28 magnet pairs, 2.0 cm apart along the axis of the slower and at varying radial distances from the axis. We determined the radial position of the magnets by simulating the combined field of all magnet pairs using Mathematica and comparing it to the ideal theoretical field for a Zeeman slower. Finally, we designed a stable, robust, compact, and easy-to-align mounting structure for the magnets in Google Sketchup, which we then printed using a commercially available 3D printer by Solidoodle. The resulting magnetic field is well suited to slow calcium atoms from the 770 m/s rms velocity at a temperature of 950 K, down to the capture velocity of the magneto-optical trap. (C) 2015 American Association of Physics Teachers.
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机译：我们介绍了使用永磁体代替更传统的电磁体的钙原子慢速塞曼减振器的设计，以及3D打印的新颖技术，可为这些磁体创建非常坚固和灵活的结构。塞曼减慢器是将原子从每秒几百米减慢到每秒几十米的理想工具。这些较慢的原子然后可以轻松地捕获在磁光阱中，这使塞曼减慢器成为许多冷原子实验室中非常有价值的工具。永磁体和3D打印的使用会导致高度稳定且坚固的减速器，适用于本科生实验室。在我们的设计中，我们布置了28对磁体，沿慢速器的轴线相距2.0厘米，并且与该轴线的径向距离不同。我们通过使用Mathematica模拟所有磁体对的组合磁场并将其与Zeeman慢速器的理想理论磁场进行比较，确定了磁体的径向位置。最后，我们为Google Sketchup中的磁铁设计了稳定，坚固，紧凑且易于对齐的安装结构，然后使用Solidoodle的市售3D打印机进行了打印。产生的磁场非常适合于在950 K的温度下从770 m / s rms速度降低钙原子的速度，直至磁光阱的捕获速度降低。 （C）2015年美国物理教师协会。
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