束源，产生分子束的装置。可分为隙流束源和超声分子束源。
研究设计了一种亚稳态氦原子束源系统。
A system of metastable helium atom beam source has been developed.
在第一微波带片与原子束源之间的原子束流中置放待测样品。
The specimen to be measured is positioned between the atomic beam source and the first microwave band plate.
首先，我们研究了超声分子束的纵向平动温度和中心速度与束源温度的关系；
First, we study the relation between the translational temperature of the molecular beam and the temperature of the beam source chamber;
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