  Transversely loaded bidimensional-magneto-optical-traps (2D-MOT) have been
recently developed as high flux sources for cold strontium atoms to realize a
new generation of compact experimental setups. Here, we discuss on the
implementation of a cross-polarized bi-color slower for a strontium atomic beam
improving the 2D-MOT loading, and increasing the number of atoms in a final MOT
by eleven times. Our slowing scheme addresses simultaneously two excited Zeeman
substates of the 88Sr 1S0->1P1 transition at 461 nm. We also realized a 3-axis
active feedback control of the magnetic field down to the microgauss regime.
Such a compensation is performed thanks to a network of eight magnetic field
probes arranged in a cuboid configuration around the atomic cold sample, and a
pair of coils in Helmholtz configuration along each of three Cartesian
directions. Our active feedback is capable of efficiently suppressing most of
the magnetically-induced position fluctuations of the 689~nm
intercombination-line MOT.
