Thread: Cryostat information

I have been looking like heck to find a good site that explains how cryostats work but with no luck. So I was wondering if anybody here can point me to one or two?

A cryostat is a machine that, if used with correct helium-types, can cool a substance to temperatures below 1K. I need to know more indepth how it works (but not too much indepth).

I have been looking like heck to find a good site that explains how cryostats work but with no luck

basicly means I have tried google

Thanks for the tips but I was not able to find anything from that either

I didnt think it was possible to freeze things to less then 1kelvin. Since at 0k there is absolutely no movement.

But there are numbers between 0 and 1.

Originally Posted by Govtcheez

But there are numbers between 0 and 1.

Heretic

Im sure that will help! Thanks a bunch!

Originally Posted by Jeremy G

I didnt think it was possible to freeze things to less then 1kelvin. Since at 0k there is absolutely no movement.

You're possibly thinking of one statement of the third law of thermodynamics:

Originally Posted by 3rd Law of Thermodynamics

Absolute zero cannot be reached in a finite number of steps

But, as Govtcheez has suggested, it's possible to get within a few hundredths of a degree Kelvin of 0K (if memory serves me correctly). At that stage it's not so much about cooling, as such, but more a precise battle against entropy - for example, aligning the spins of hydrogen nuclei at low temperatures results in a lowering of entropy which equates to a reduction in temperature of that hydrogen. This follows on from a variant statement of the third law of thermodynamics, namely: all perfectly crystalline materials have zero entropy at absolute zero.

Originally Posted by Ken Fitlike

But, as Govtcheez has suggested, it's possible to get within a few hundredths of a degree Kelvin of 0K

Yes, the coolest and warmest temperatures observed by humans in the universe have both been observed on earth.