【摘要】 一些低增益弱线CO2激光光谱在分离某种同位素方面是非常有用的。在成比例的混合气体中很难获得这些谱线的输出,须适当提高CO2和N2的含量,但结果给主电极的辉光放电带来了困难。通过对改装后的双预电离放电回路的参量进行调节,实现了对预电离的单独控制,有利于增强预电离效果,使高含量的CO2混合气体的放电和出光成为可能。理论和实验证明了双预电离能较好地改善TEA CO2激光器的放电性能,尤其是有望实现用于分离某些同位素的弱线输出。更多还原

【Abstract】 Some low gain CO₂ laser spectra are very important in separating isotope.However,it is often difficult to acquire these spectra in usual laser mixture ratio.Only if the ratio of CO₂ to N₂ is improved,these spectra can be observed. But high ratio of CO₂ to N₂ is harmful to glow discharge between main electrodes.Double pre-ionization can overcome the difficulty.The pre-ionization has been controlled and reinforced by adjusting the discharge parameters of double pre-ionization circuit.The theories and experiments prove that double pre-ionization can improve the discharge properties of TEA CO₂ laser.Especially,weak spectra output used for separating certain isotope with double pre-ionization device.更多还原