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Graphic:
"Absolute Zero is: The point where molecules reach their slowest oscillations."
"0 Kelvin"
"or..."
"-273 degrees Celsius"
"or..."
"-459 degrees Fahrenheit"
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KEVIN: When you try to keep something that cold, you usually have to have a multi-stage system. We do that as well.
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Graphic:
"Solid neon is 17 Kelvin or -256 degrees Celsius."
There is a close-up of the XRS, being held by Kevin. First we're looking at the outside of the XRS. This layer is filled with solid neon.
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KEVIN: There's an outer layer of solid neon, that's 17 Kelvin. That's pretty cold for you and me, but that's still blazingly hot for our detectors.
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Then Kevin opens the XRS up and pulls out a second container that holds liquid helium.
An animation shows the inside of this container and the placement of the liquid helium and the adiabatic demagnetization refrigerator.
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KEVIN: So inside that, there's a layer of liquid helium. And that's helium, like helium in your helium balloons and that's at about 1.3 Kelvin. And then inside that there's what we call an adiabatic demagnetization refrigerator, which uses magnetic spins inside actual atoms and aligns them and de-aligns them in such a way to get us down to 60 millikelvin.
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