Ring model of a CW chemical HF laser with a chain excitation mechanism

A ring model of a chemical HF laser with chain excitation is described, and results obtained with this model are presented. It is shown that the geometry of the model makes it possible to obtain conditions in the cavity sufficient for the neutralization of the thermal effect and thus to solve the problem of the thermal choking of the supersonic channels. High levels of chemical efficiency (10%), specific laser energy (1 kJ/g), and laser power (1 kW/sq cm) can be achieved for certain operating conditions of the HF ring laser. The chain excitation mechanism makes it possible to obtain high static pressures in the cavity region (up to 15-25 torr), which is important for solving the ejector problem. In addition, the design of a chain-excitation HF laser with a cylindrical nozzle unity may make it possible to raise the total efficiency of the system.