  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.
