A low-velocity beam of rubidium atoms is produced from a two-dimension
al magneto-optic trap or atomic funnel. Atoms from a thermal beam are
slowed by chirped laser cooling and then loaded into the funnel. The c
old atoms are ejected by moving molasses formed with frequency-shifted
laser beams. The resultant atomic beam has a controllable velocity in
the range of 3 to 10 m/s, a temperature of 500 mu K, and a flux of 10
(10) atoms/s. (C) 1996 Optical Society of America.