由于是冷凝低温式机器(冷凝泵在密闭腔内能产生高真空环境，带电粒子在高真空中才能生存：译者注)，运行时候温度极低，LHC要回到常温大概要一个月，并且致冷过程也要花费一个月。
Being a cryogenic machine operating at very low temperature, the LHC takes about a month to bring up to room temperature and another month to cool down.
在靠冷凝器的位置有一个气动蝶阀，将冷凝器与真空系统隔开。
A pneumatically activated butterfly valve is located close to the condenser to isolate the vacuum system from the condenser.
设计真空硅热还原炉进行了验证试验，得到冷凝金属锂。
The verification test was carried out in a vacuum silicothermic reducing furnace to obtain the condensed lithium metal.
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