论文标题
通过聚焦在24 GHz处的循环辐射持续的非平衡微波等离子火炬的光学发射光谱
Optical emission spectroscopy of non-equilibrium microwave plasma torch sustained by focused radiation of gyrotron at 24 GHz
论文作者
论文摘要
通过光学发射光谱法测量了由聚焦的24 GHz微波束维持的非平衡氩等离子火炬的电子和气温。发现氩原子的激发温度约为5000 K，而环境氮分子的振动和旋转温度分别估计为3000 K和2000K。外部气体气氛的有效混合在实验上证明了在血浆中的有效混合。随着距喷嘴出口距离的距离，氮分子的振动和旋转温度略有增加。实验结果表明，在大气压下的微波排出可能与高度稳定的分子的分解有关，例如二氧化碳，在非平衡条件下。
The electron and gas temperature of non-equilibrium argon plasma torch sustained by a focused 24 GHz microwave beam in the external atmosphere of air was measured by optical emission spectroscopy. The excitation temperature of argon atoms was found about 5000 K, while the vibrational and rotational temperatures of ambient nitrogen molecules were respectively estimated at 3000 K and 2000 K. The effective mixing of the external gas atmosphere into the plasma torch is experimentally demonstrated. The vibrational and rotational temperatures of nitrogen molecules slightly increased with the distance from the nozzle exit. Experimental results demonstrate that microwave discharge at atmospheric pressure may be relevant for the decomposition of highly stable molecules, e.g. carbon dioxide, in non-equilibrium conditions.
