Solenoid Cold Trap for Thermal Vacuum Chamber.

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{XtremeDry}

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Anybody here can explain to me the function of solenoid cold trap for thermal vacuum chamber. I heard the explanation from the mechanical guy in my company; however, i can't fully understand its function and figure out how it really works. What is its part in the chamber?
Thanks.
 
Welcome to ETO, {Xtremely}!

... explain to me the function of solenoid cold trap for thermal vacuum chamber...

I'm going to assume the term "solenoid" is a control term, rather than a specific type of cold trap.

A "cold trap" is a passive device used to remove moisture from a gaseous sample. For instance, to remove water vapor from a sample of air (in your example, the air being removed from the vacuum chamber), thereby "drying" the air.

Typical "cold trap":
A gaseous sample, injected on the right, passes through a trap chamber (which is immersed in, for example, ice, dry ice or liquid nitrogen) where a condensate collects on the inside walls of the trap and then a more dry (less "wet") gaseous sample leaves from the left.

There a many, many uses for cold traps.

As for the term"solenoid"; it is probably referring to a device that opens and/or closes a valve controlling the gaseous flow..
 
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There are cold traps for vacuum diffusion pumps which are thermal. Without the cold trap the pump would not work. Usually these are cooled by LN2 or other system.
 
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