Enhanced Loading of $^{40}$K from Natural Abundance Potassium Source with a High Performance 2D$^{+}$ MOT
Jiang-Ling Yang1,2 , Yun Long1 , Wei-Wei Gao1 , Lan Jin1 , Zhan-Chun Zuo1,2 , Ru-Quan Wang1,2**
1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 1001902 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049
Abstract ：$^{40}$K is one of the most important atomic species for ultra-cold atomic physics. Due to the extremely low concentration (0.012%) of $^{40}$K in natural abundance of potassium, most experiments use 4–10% enriched potassium source, which have greatly suffered from the extremely low annual production and significant price hikes in recent years. Using naturally abundant potassium source, we capture $5.4\times10^{6}$ cold $^{40}$K atoms with the help of a high performance of two-dimensional magneto-optical trap (2D$^{+}$ MOT), which is almost three orders of magnitude greater than previous results without the 2D$^{+}$ MOT. The number of the $^{40}$K atoms is sufficient for most ultra-cold $^{40}$K experiments, and our approach provides an ideal alternative for the field.
收稿日期: 2017-11-21
出版日期: 2018-02-25
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2018, Vol. 35 
