在铁架台上,用铁夹把一个倒立的烧瓶夹住,并用一个有孔胶塞塞住瓶口,塞内插一玻璃管和一胶管相连,如上图所示,即成一简单的膨胀云雾室。二、实验演示实验L 降低温度,使未饱和汽变成饱和汽。这里降低温度是用汽或气膨胀时的冷却效应来完成的。其方法,先取下烧瓶,去掉胶塞,在瓶内滴液体乙醚数滴,立见乙醚完全汽化,此时瓶中即有未饱和乙醚蒸汽存在(如空气的相对湿度大,可以不用乙醚滴人瓶内,效果亦好)。其次,放入少许烟粒于瓶内,即行紧塞烧瓶,如前将烧瓶倒立夹于铁架台上。用打气筒(打足球用的)和胶管相连,向瓶内打气三、四下, On an iron stand, clamp an inverted flask with an iron clip and plug the bottle opening with a perforated plug. Plug a glass tube into the tube and connect it with a hose as shown in the figure above, forming a simple expanded cloud chamber . Second, the experimental demonstration experiment L to reduce the temperature, so that unsaturated steam into saturated steam. Here to reduce the temperature is the cooling effect of gas or gas expansion to complete. The method, first remove the flask, remove the stopper, the liquid drops in the bottle a few drops of ether, legislation see the complete vaporization of ether, this time there is a bottle of saturated ether vapor exists (such as air relative humidity, you can not drop ether Bottle, the effect is also good). Second, put a small amount of soot in the bottle, that is, tighten the flask, as before the flask upside down clip on the iron stand. With a pump (used to play football) and hose connected to the bottle cheer three or four,