Kinetics of Oxygen Discharges and I(~2P_(1/2) Excitation for EOIL

摘要

The electric oxygen-iodine laser (EOIL) concept uses an electric discharge plasma to generate an effluent flow containing singlet oxygen, O_2(a~1 Δ), and atomic oxygen, O, which react with I_2 to excite the atomic iodine laser transition at 1.315 μm. This chemically rich system has unique characteristics, whose understanding requires systematic chemical kinetics investigation under carefully selected conditions to isolate the key reaction mechanisms. We describe a series of reacting flow measurements on the reactions of discharge-excited active-O_2 with I_2, using a comprehensive suite of optical emission and absorption diagnostics to monitor the absolute concentrations of O_2(a~1 Δ), O_2(b~1 summation), O(~3P), O_3,I_2,I(~2P_(3/2)), I(~2P_(1/2)), small-signal gain, and temperature. These multispecies measurements help to constrain the kinetics model of the system, and quantify the chemical loss mechanisms for I(~2P_(1/2).