美国弗米(Fermi)国立加速器实验室的中心氦液化器设备已开始运转,此设备可使世界液化氦能力增加差不多一倍。设计主任罗那德·沃克(RonaldWalker)说:“该液化设备初始生产速度约2000升/小时,液化器设计能力现在为4500升/小时。”他估计,该设备有可能超过这个速度。此液化器生产的氦将用于将1000个双极和四极磁铁冷却到-450°F(4.6°K),这 The center helium liquefier facility at the Fermi National Accelerator Laboratory has already begun operation, doubling the world’s capacity to liquefy helium. Ronald Walker, director of design, said: “The initial production of the liquefaction plant was about 2000 liters / hour and the liquefier design capacity was now 4500 liters / hour.” He estimates the unit is likely to exceed that rate. The liquefier produced helium will be used to cool 1000 bipolar and quadrupole magnets to -450 ° F (4.6 ° K), which