Enhanced Loading of ~(40)K from Natural Abundance Potassium Source with a High Performance 2D~+ MOT

~(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 × 10~6 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.