Helium is a scarce natural resource, used for medical scanning devices, academic low-temperature research and particle detectors. Once released, helium escapes our atmosphere and is lost for future generations. Efficient recovery is therefore important for sustainability. The finite earth depositories of helium also imply an ever growing helium price. Recovery therefore also has an economic incentive. Here we provide information and suggestions for good helium practice - a must read for helium users of our department.
To reduce helium loss, following practice is recommended:
The first two points optimize the recovery and point three reduces "cost" to re-cool the dewar.
Much helium loss originates from human lapses. Most common points are:
Good to know:
Please look also at the information from ETHZ, which describes the actual situation (November 2022). Link (PDF, 926 KB)