气体分子平均自由程

通常所称的气体分子平均自由程并未计及容器器壁的影响。

In general , in calculating mean free-path of gaseous molecules , the effect of container is not considered .

本文以常见的无限长圆管道为例，分析了有限空间气体分子平均自由程和无限空间气体分子平均自由程的关系，并得出了一个近似计算公式。

In this paper , we take an infinitely long pipe of circular cross-section as a example in analysing the relation between the mean free-path in an infinite space and that in a limited space . An approximate formula is also given .

长圆管道内气体分子的平均自由程

Mean Free-Path of Gaseous Molecules in a Long Pipe of Circular Cross-Section

气体分子的平均自由程

Mean free path of gas molecules

结果表明，射频功率的改变直接影响到离子对衬底的轰击效应，而反应气压的改变影响气体分子的平均自由程。

Results show that the change of power affects ions'bombardment on the substrate , and that of pressure lead to the change of the mean free path of the molecular .

气体分子碰撞频率和平均自由程公式的严格推导

A Research on Formula between collision Frequency of Gas Molecule and Average Free Procedure