Laser gas temperature control and spacial equalizer

摘要

A system for substantially eliminating undesirable temperature transients and spacial gradients in the laser gas flow through a laser cavity having a large system heat exchanger positioned upstream of the cavity which provides an exit gas temperature Ti approximately 5 degrees above the desired cavity inlet temperature wherein the large heat exchanger has a time dependent tolerance of +/-5 degrees. A trimmer heat exchanger is positioned between the large heat exchanger and the cavity. A flow of saturated liquid coolant through the trimmer heat exchanger from a tank is provided by a constant displacement pump, with the flow rate of the coolant set to remove a maximum heat load corresponding to a 10 degrees temperature drop in the gas flow through the trimmer heat exchanger. The saturated liquid temperature and pressure of the liquid in the tank is adjusted to the desired level by controlling the pressure in the tank with an absolute pressure regulator.