测定电离复合速率常数的激波管方法

发展了测定电离复合速率常数的一种新的激波管方法。在这一方法中使用反射激波加热预混气体使之电离,相继用可控制的强稀疏波使之快速冷却,冷却速度很快,可达106K/s, 使之在冷却过程中,电离远离平衡态。用压电传感器和Langmuir 探针监测状态变化历程和离子浓度,并可获得过程中所有的状态参数。测定了NO e 电离复合速率常数。实验表明这一方法简易可靠

A shock tube method for Determination of the rate constants for ionization recombination

A new shock tube method has been developed for determination of the rate constant of ionization recombination, in which the premixed gas is ionized by the reflection shock wave and subsequently quenched by a strong rarefaction wave. The quenching speed is so rapid as 10 6 K/s , That the ionization is in far from equilibrium during the quenching process. A piezoelectric transducer and a Langmuir probe are used to monitor the changing histroy of the states and the ion density, by which all the state parameters can be obtained during the process. The rate constants for the ionization recombination of NO e are studied. It is shown that the method is simple and reliable.