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Noble gas lasers are of interest for many applications because they exhibit long-tern frequency stability, a wide range of wave-lengths, and useful power levels. In this work, a 3m longitudinal discharge laser designed to operate at pressures down to 5 $\mu$, and at currents exceeding 2000 A was used to survey the infrared between 2 and 18 $\mu$. Twenty-six new infrared laser transitions were observed in Kr, Ar, and Xe. The transitions range in wavelength from 3.458 to 17.233 $\mu$, and all but one of the transition were identified using neutral species tern $values.(1)$