Zeeman Slower for Fermionic Potassium Atoms with Natural Abundance Sample

We present a new atomic source for $^{40}$K based on a Zeeman slower using natural abundance potassium. This method has practical and technical advantages over the conventional method of using enriched potassium. At the position of the $^{40}$K MOT, the Zeeman slower has a maximum flux of 2 $\cdot $ 10$^{7}$ atoms/s/cm$^{2}$, which is comparable to other techniques. This new atomic source saves expenses by not using enriched $^{40}$K samples and simplifies complications in other techniques. Our method serves as a simple and robust $^{40}$K source for the studies of fermionic atoms.