Experimental and theoretical investigation of singletoxygen bubbler generator for an oxygen-iodine laser

The following conclusions can be drawn from the calculated and experimental data concerning the operation of the SOG considered here: 1. The rate of chlorine production is limited by mass transport in the gas phase. A value\(\beta _g ^v \cong 1000/P\) (torr)·sec−1 was obtained for the gas mass output coefficient per unit volume of the reactor. 2. Satisfactory agreement was obtained between the experimental and calculated SOG exit parameters at a surface massoutput coefficient\(\beta _s \cong (30 - 50) \cdot \sqrt {b_s (mole/liter)} cm/\sec .\). 3. The elimination of HO 2 − ions from the solution surface is insignificant in the regimes considered here. The escape of O2(1Δ) from the surface of the solution into the gas phase is close to 100%. 4. The use of a funnel did not decrease the fraction of O2(1Δ) at the generator output, but made it possible to stabilize the bubbling regime, and also increase greatly the degree of chlorine utilization, owing to the decrease of the gas-phase scale. 5. It was found that the O2(1Δ) yield decreases with the height of the working-solution layer, starting with h l ≅4–5 cm, a value corresponding to optimum SOG efficiency ξoutη. 6. At optimum height of the solution layer, the relative fraction of O2(1Δ) at the exit from a bubbler SOG is\(\eta _\Delta ^{out} \cong 85 - 60\%\) at\(\dot m_{Cl_2 } /S \cong 0.01 - 0.1\) mmol/cm2·sec respectively. 7. In our opinion, the bubbler SOG considered here can be used in subsonic cw COIL with\(\dot m_{Cl_2 } /S \leqslant 0.03\) mmol/cm2·sec and with\(\dot m_{Cl_2 } /S \cong 0.05 - 0.1\) mmol/cm2·sec in supersonic cw and pulsed COIL. 8. Taking the foregoing results into account, it can be concluded that in the investigated range of chlorine loading the parameter that decides the O2(1Δ) content is pτ. From the standpoint of comparing the bubbler type SOG considered here with rotor-film and jet types, the conclusions 1 and 3 attest to the similarity of the operating conditions of various generator types. With a suitable choice of bubbler SOG design that minimizes pτ it is therefore possible to expect it to operate at pressures not inferior to those reached in jet and film SOG; this is particularly important for the use of bubbler SOG in supersonic COIL.