  We describe an apparatus designed to trap and cool a Yb and Cs mixture. The
apparatus consists of a dual species effusive oven source, dual species Zeeman
slower, magneto-optical traps in a single ultra-high vacuum science chamber,
and the associated laser systems. The dual species Zeeman slower is used to
load sequentially the two species into their respective traps. Its design is
flexible and may be adapted for other experiments with different mixtures of
atomic species. The apparatus provides excellent optical access and can apply
large magnetic bias fields to the trapped atoms. The apparatus regularly
produces 10${}^{8}$ Cs atoms at 13.3 $\mu$K in an optical molasses, and
10${}^{9}$ Yb atoms cooled to 22 $\mu$K in a narrowband magneto-optical trap.

Atomic Physics