The development of a nozzle which gasdynamically accelerates neutral copper atoms at controlled energy levels, and flux rates suitable for the investigation of inelastic copper atom collision processes is reported. Preliminary test data demonstrate that vapor deposited rhenium nozzles do not degrade in the presence of copper vapor at high temperatures. Operation with high purity helium gas at nozzle stagnation temperatures in the range 2650–2700 K and total stagnation pressures from 1/4 to 2 atm with continuous copper atom flux rates of [inverted lazy s] 1018sec−1has been maintained, for a total time of 8 1/2 h to date.