Laser Cooling?

[Peltier_For_Brains]

I've heard about laser cooling, and how it takes temps down to millionths of degrees from 0K. Can anybody explain how this works?


It sounds like a fun thing to cool a TBird with.

[imagex]

as far as i've heard lasers creat heat and need to be cooled, alot use pelt systems. but i could wrong, may they'er talking about "cooling a laser"?

[Joe]

With lasers far different then the laser types you are thinking about they can control the movement of atoms and electons. Slowing them to the point where the substance can go to a fraction of a degree above 0K.

But they can only do that on atomic particles currently. Nothing as big as a molecule has been done.

Also at close to 0K a CPU would stop functioning as the semi conductor turns into an insulator at those temps.

[OC-House]

PELTUER DUDE YOU ARE MY FRIEND TO I LOVE YOU.......BUT ONE THING IS FOR SURE , YOU ARENT THE SHARPEST TOOL IN THE SHED! LOLOL

[LmA]

i woked at a computer company a few months ago, and a big client of ours was a lasercompany.. as well stated, lasers are lika any other light, composed of energy (fotons) and when thay hit a suface thay ether bounce or getts converted to heat.

the cool thing is that the company hadd large kompressors with air, wich thay blew onto the linses, cooling them down to aprox -70 in about 0.68 secounds.. only with air..

black label delta? 1 0wn y4!

i like one of those kompressors..

imagen tha possabillaty of running a amd 1400 at sub zero with no heatsink atall.. )

[WaterPog]

Originally posted by Les Misserable:
i woked at a computer company a few months ago, and a big client of ours was a lasercompany.. as well stated, lasers are lika any other light, composed of energy (fotons) and when thay hit a suface thay ether bounce or getts converted to heat.

the cool thing is that the company hadd large kompressors with air, wich thay blew onto the linses, cooling them down to aprox -70 in about 0.68 secounds.. only with air..

black label delta? 1 0wn y4!

i like one of those kompressors..

imagen tha possabillaty of running a amd 1400 at sub zero with no heatsink atall.. )

I think what you are talking about is called a "Vortex-tube" they are used in industrial applications like you mentioned and work VERY well. The drawbacks are Noise (usually over 70db!! "black label delta? 1 0wn y4!" NOT!!) and the need for a LARGE high pressure compressor (100psi+). other than that it would be a great option for us...

[RJ-45]

Originally posted by Joe:

Also at close to 0K a CPU would stop functioning as the semi conductor turns into an insulator at those temps.

I had heard that electricity conducts perfectly at absolute zero but i could be wrong since electrons have to be passed for atom to atom to conduct electricity

[Joe]

Since there is no atomic movement at 0 Kelvin that includes electrons, the matter would not reflect light, or conduct electricity.

The closer you get to 0 K the slower electrons will move.

[Butcher]

RJ-45, you're thinking of the superconductor effect which doesn't work in semiconductors... copper and the like are superconductive at almost 0K, but silicon is not.