15 November 2010 Hybrid RF/DC plasma torch for generation of singlet oxygen in discharge oxygen-iodine laser
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Proceedings Volume 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; 77510G (2010) https://doi.org/10.1117/12.880937
Event: 18th International Symposium on Gas Flow and Chemical Lasers and High Power Lasers, 2010, Sofia, Bulgaria
Abstract
Latest advances in development of a hybrid RF/DC plasma jet generator of O2(1Δ) for a discharge oxygen-iodine laser are presented. This novel apparatus is based on a fast mixing of hybrid Ar+He plasma jet of DC electric arc sustained by an RF discharge with an injected neutral O2+He+NO stream. Calculations of singlet oxygen yield have shown that only non-equilibrium plasma with a high content of heated electrons (~3 eV) and a gas temperature of ~2500 K appears to be promising for an achievable yield of singlet oxygen up to ~42 %. A stable high-pressure hybrid RF/DC plasmatron with a diffusive arc mode near the anode side (assisted by a plasma anode) was demonstrated experimentally in the mixture Ar:He = ~9.84:5 mmol/s at a power level of 610 W (RF power 490 W and DC arc power 120 W) and at a pressure of 165 Torr. The specific energy of the plasma jet was 41 J/mmol. A generation of singlet oxygen was performed by a laterally symmetric injection of neutral mixture O2:He:NO = 1.5:2.44:0.22 mmol/s into the plasma jet of the hybrid RF/DC plasmatron. The estimated yield of singlet oxygen O2(1Δ) was ~5 % at a pressure of 10.5 Torr.
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Josef Schmiedberger, Josef Schmiedberger, Karel Rohlena, Karel Rohlena, Jan Gregor, Jan Gregor, Petr Křenek, Petr Křenek, Vít Jirásek, Vít Jirásek, Miroslav Čenský, Miroslav Čenský, Jarmila Kodymová, Jarmila Kodymová, } "Hybrid RF/DC plasma torch for generation of singlet oxygen in discharge oxygen-iodine laser", Proc. SPIE 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 77510G (15 November 2010); doi: 10.1117/12.880937; https://doi.org/10.1117/12.880937
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