Jefferson Lab Site Tour

Central Helium Liquefier

Central Helium Liquefier

The Central Helium Liquefier is a large refrigerator located in the middle of Jefferson Lab's accelerator. Compressors inside the CHL take Helium stored outside in large tanks and chill it to 456 degrees below zero Fahrenheit - nearly Absolute Zero. This cold Helium is sent through underground pipes to the straight parts of Jefferson Lab's accelerator where it is used to keep the acceleration cavities cold.