High flux strontium atom source

Abstract

We present a novel cold strontium atom source designed for quantum sensors. We
optimized the deceleration process to capture a large velocity class of atoms emitted
from an oven and achieved a compact and low-power setup capable of generating
a high atomic flux. Our approach involves velocity-dependent transverse capture
of atoms using a two-dimensional magneto-optical trap. To enhance the atomic
flux, we employ tailored magnetic fields that minimize radial beam expansion and
incorporate a cascaded Zeeman-slowing configuration utilizing two optical frequencies.
The performance is comparable to that of conventional Zeeman slower sources, and
the scheme is applicable to other atomic species. Our results represent a significant
advancement towards the deployment of portable and, possibly, space-based cold atom
sensors.