An atom faucet

We present a simple and efficient source of slow atoms. From a background v apour loaded magneto-optical trap (MOT), a thin laser beam extracts a conti nuous jet of cold rubidium atoms. The jet that is typical to leaking MOT sy stems is created without any optical parts placed inside the vacuum chamber . We also present a simple three dimensional numerical simulation of the at omic motion in the presence of these multiple saturating laser fields combi ned with the inhomogeneous magnetic field of the MOT. At a pressure Of P-Rb 87 = 10(-8) mbar and with a moderate laser power of 10 mW per beam, we gene rate a flux Phi = 1.3 x 10(8) atoms/s with a mean velocity of 14 m/s and a divergence of 10 mrad.