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Month: April 2017

Lowering the Temperature of Liquid Nitrogen

Lowering the Temperature of Liquid Nitrogen

  Liquid nitrogen (LN) is widely used in experiments where cryogenic temperatures are needed. The temperature of LN at 1 atm is 77.3 K. Some experiments might require temperatures slightly below this limit. In the phase diagram we are on the equilibrium line between the liquid and the gaseous phase. To push this equilibrium to lower temperatures, toward the triple point we need to lower the pressure. The equilibrium temperature at the triple point is 63.1 K. One way of…

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