A 10 MW peak power, 1000 pps transverse discharge CO2 laser is under construction. This device will be employed to optically pump a far-infrared medium, NH3 for example, and comprise the submillimeter master oscillator of an alpha Thomson scattering diagnostic for fusion plasmas. Transverse laser discharge stability will be maintained by a compact flow recirculation flow loop which is contained within a compact (1 m diam ×1.5 m long) cylindrical pressure vessel. Magnetic pulse compression techniques will also be employed to efficiently generate the laser discharge. System details and current fabrication status will be presented.