Liquid helium of liquid water. Helium was first liquefied on July 10, 1908, by the Dutch physicist Heike Kamerlingh Onnes at the University of Leiden in the Netherlands. At that time, helium-3 was unknown because the mass spectrometer had not yet been invented. In more recent decades, liquid helium has been used as a cryogenic refrigerant, and liquid helium is produced commercially for use in superconducting magnets such as those used in magnetic resonance imaging (MRI), nuclear magnetic resonance (NMR), Magnetoencephalography (MEG), and experiments in physics, such as low temperature Mössbauer spectroscopy. The temperature required to produce liquid helium is low because
Delft University of Technology Hanjalić, and the first Dutch prime minister of the Netherlands after World War II Wim Schermerhorn. Two TU Delft alumni were awarded Nobel Prize and one recipient has been affiliated with TU Delft: Jacobus van 't Hoff was awarded first Nobel Prize in Chemistry in 1901 for his work with solutions. Simon van der Meer was awarded Nobel Prize in physics in 1984 for his work on stochastic cooling and one has been affiliated with TU Delft, Heike Kamerlingh Onnes in 1913 for studies related to liquefaction of helium in the quest for the lowest temperature on Earth. Some of