Liquid Helium Storage — LHe Cryogenic Dewar Selection

Storing Liquid Helium? Start Here

Liquid helium is incredibly cold, making it the go-to choice for cooling superconducting magnets in MRI machines, particle accelerators, and quantum labs. However, it's not just its temperature that makes it unique; helium is a limited resource, primarily extracted from natural gas wells in a few countries. This scarcity means efficient use and recycling are key. If you're dealing with liquid helium, you're likely involved in high-tech applications where precision and safety are paramount.

Can you store it in a poly tank?

No, you cannot store liquid helium in a polyethylene tank. Polyethylene and similar plastics become brittle and shatter at the extreme low temperatures of liquid helium. Instead, specialized cryogenic dewars made from materials like stainless steel and copper are essential.

Handling the Cold

Liquid helium's extreme cold can cause most materials to become brittle and fail. This makes the choice of storage materials critical. Stainless steel and specific polymers like PTFE are typically used to ensure safety and integrity at these low temperatures.

The safety that actually matters

• Ensure storage in vacuum-insulated vessels to minimize heat transfer.
• Use materials that maintain structural integrity at cryogenic temperatures.
• Implement robust helium recovery and recycling systems to manage supply constraints.

Common questions

Why can't I use a standard tank for liquid helium?

Standard tanks can't handle the extreme cold, causing them to become brittle and fail.

What materials are suitable for storing liquid helium?

Stainless steel, copper, and specific polymers like PTFE are suitable due to their ability to withstand low temperatures.

How is helium recovered and recycled?

Helium is captured and re-condensed in specialized systems to ensure efficient use and supply management.