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When most people think of helium, they think of balloons, which float as a result of the low density of the inert gas.��However, helium has many uses beyond birthday party decorations. Helium plays a critical role in scientific research, medical technology, high-tech manufacturing, space exploration��and national defense. Helium’s unique properties –��its low boiling point, low solubility, low density��and inertness – make it an important resource.

Due to its low density – much lower than air��–��helium escapes earth’s��atmosphere. Most of earth’s helium deposits are underground in natural gas reserves. Unfortunately, according to the,��these finite reserves are being “rapidly depleted.” As a result, there is a need for efficient and economically viable helium recovery.

Luckily, researchers across the world have attempted to offer solutions to this ever-growing problem. At��CU �Ǹ�Թ�, the physics department operates a helium recycling/liquifying facility that received a CU Green Labs Award in 2022. As researchers in physics and JILA use liquid helium, it is captured and sent back to the shop for re-liquefaction, reducing the amount of helium lost and saving the researchers money.

The physics helium liquefier could become a critical resource for keeping research going on campus through enhanced re-use of helium.��The physics helium facility at CU �Ǹ�Թ� is paving the way towards a sustainable helium future and serves as an example for other campuses to follow.