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首页> 外文会议>Gas flow, chemical lasers, and high-power lasers >Hybrid RF/DC plasma torch for generation of singlet oxygen in discharge oxygen-iodine laser
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Hybrid RF/DC plasma torch for generation of singlet oxygen in discharge oxygen-iodine laser

机译：混合RF / DC等离子炬在放电氧碘激光器中产生单线态氧

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摘要

Latest advances in development of a hybrid RF/DC plasma jet generator of O_2(~1△) 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 O_2+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 O_2: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 O_2(~1△) was ~5 % at a pressure of 10.5 Torr.
机译：介绍了用于氧碘放电激光的O_2（〜1△）混合RF / DC等离子体射流发生器的最新进展。这种新颖的设备基于通过射频放电维持的直流电弧的混合Ar + He等离子射流与注入的中性O_2 + He + NO流的快速混合。单线态氧产率的计算表明，只有具有高含量的加热电子（〜3 eV）和气体温度约为2500 K的非平衡等离子体，才有望达到约42％的单线态氧产率。在Ar：He =〜9.84：5 mmol / s的混合物中，在功率为610 W的情况下，通过实验证明了在阳极附近具有扩散弧模式（由等离子体阳极辅助）的稳定高压混合RF / DC等离子加速器（RF功率490 W，DC电弧功率120 W），压力为165 Torr。等离子体射流的比能为41J / mmol。通过将中性混合物O_2：He：NO = 1.5：2.44：0.22 mmol / s横向对称注入混合RF / DC等离子加速器的等离子束中来产生单线态氧。在10.5 Torr的压力下，单线态氧O_2（〜1△）的估计产率为〜5％。

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