  We demonstrate continuous Sisyphus cooling combined with a continuous loading
mechanism used to efficiently slow down and accumulate atoms from a guided
beam. While the loading itself is based on a single slowing step, applying a
radio frequency field forces the atoms to repeat this step many times resulting
in a so-called Sisyphus cooling. This extension allows efficient loading and
cooling of atoms from a wide range of initial beam conditions. We study the
interplay of the continuous loading and simultaneous Sisyphus cooling in
different density regimes. In the case of a low density flux we observe a
relative gain in phase-space density of nine orders of magnitude. This makes
the presented scheme an ideal tool for reaching collisional densities enabling
evaporative cooling - in spite of unfavourable initial conditions.
