高强度、超声速分子束束斑测量

A METHOD TO MEASURE THE DIAMETER OF SUPERSONIC MOLECULAR BEAM WITH HIGH INTENSITY

提出了一种检测分子束束斑直径的方法,研制了一套用以测量分子束斑直径的全玻璃分子束系统,并对H_2、N_2、Ar等气体的分子束进行了测量;通过与理论计算值、光学测量法比较,讨论了误差,得到了满意的结果;最后提出了以束强在束斑截面上的分布来定义束斑直径(称为有效直径)的概念,并给出了作法和结果。

A method to measure the diameter of molecular beam with a glass system has been investigated. It has been used to measure the diameters of the molecular beams of H_2,N_2 and Ar. The results have been carefully checked and compared with the calculated and optically measured values. Finally, the concept for effective diameter of molecular beam is presented.