4012 Liquefier Cold Box
Liquefier production is around 170 or 70 litre/hour with or without nitrogen pre-cooling.
A helium compressor 80g/s (1600 m3/h) and an Air Liquide cold box make up the liquefier.
Its cooling power is around 80 Watt at 1.8 K
Helium Compressor 80g/s
Pumping System decreases the helium bath temperature down to 1.8 K inside the cryostat.
Pumping System allows decreasing the helium bath pressure down to 13 mb with a gas flow around 4 g/s.
It is made up of two Alcatel roots pumps (series 8000) with 4700 and 9700 m3/h of pumping speed and three primary pumps (1900 m3/h).
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Dernière mise à jour : 21-11-2024
