Chemical oxygen-iodine laser with instantaneous production of atomic iodine from gaseous reactants

摘要

An alternative method of atomic iodine production for a Chemical Oxygen-Iodine Laser (COIL) was studied. The proposed all-gas process include reaction of chlorine dioxide (ClO_2) with nitrogen oxide (NO) followed by subsequent reaction of atomic chlorine with hydrogen iodide (HI). In difference to our previous experiments, atomic iodine was produced separately from the primary flow. The generated atomic iodine was injected through two rows of sonic oriffices into the supersonic part of the converging-diverging nozzle, 2 mm downstream the nozzle throat. A penetration of atomic iodine to the primary flow was substantially improved by introducing additional nitrogen downstream the iodine injector. This led to an increasing I number density and static temperature. Inversed order of reactants injection (HI-NO instead of NO-HI) substantially increased the production efficiency. Some results were explained by 2-D modelling. Number density of atomic iodine up to 1.6 x 10~(15) cm~(-3)was attained in laser cavity with nearly 100% efficiency.