据日刊报道,日立制作所机械研究所研制出冷冻能力为5瓦特的磁冷冻机,这是目前世界上冷冻容量最大的磁冷冻机,它用于把—269℃(4.2K)的液态氦(氦Ⅰ)进一步冷却,成为2.2K以下的超流动氦(氦Ⅱ),从而大幅度提高用液氦冷却的加速器超导磁铁的性能和电子显微镜的分辩能力。 According to the Nikkan Jidosha Shimbun, the Hitachi Institute of Machinery has developed a magnetic freezer with a capacity of 5 watts, which is the largest freezer in the world with a capacity of -269 ° C (4.2 K) Helium I) is cooled further to become superfluid helium (helium II) below 2.2 K, thereby greatly improving the performance of the accelerator superconducting magnet cooled with liquid helium and the ability of the electron microscope to distinguish it.