Helium liquefaction and cryostats

Many of the investigations at the Dresden High Magnetic Field Laboratory take place at temperatures close to absolute zero (-273.15 °C). The cryostats next to the wall are highly insulated cooling vessels in which the material samples are cooled by liquid helium for experiments in the pulsed magnetic fields. In a cycle operation, the helium that evaporates during the measurements is collected, liquefied again in a large helium liquefier and can then be brought to the pulsed field cells in transport dewars for new experiments.