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    • 9. 发明授权
    • Magnetic field generator, a persistent current switch assembly for such
a magnetic field generator, and the method of controlling such magnetic
field generator
    • 磁场发生器,用于这种磁场发生器的持续电流开关组件,以及控制这种磁场发生器的方法
    • US5680085A
    • 1997-10-21
    • US462762
    • 1995-06-05
    • Katsuzo AiharaShinpei MatsudaTomoichi Kamo
    • Katsuzo AiharaShinpei MatsudaTomoichi Kamo
    • G01R33/3815H01L39/20H01F1/00
    • H01L39/20G01R33/3815Y10S505/882
    • A magnetic field generator has a superconductive coil immersed in a coolant material. When power is supplied to the superconductive coil from a suitable power source, the superconductive coil is energized to generate the magnetic field. The ends of the superconductive coil may then be shorted through a persistent current switch, to maintain the magnetic field without the need for further power. The persistent current switch has a superconductive connection connected across the ends of the superconductive coil and a heater. These components are enclosed in a casing with a gap between these components and the casing. Apertures in the casing permit coolant material to enter the gap. When the heater is energized, it heats the coolant material in the gap until it vaporizes. There is then a significant decrease in the thermal conductivity through the gap and hence the superconductive connection is heated rapidly to its critical temperature. Only low power is needed. When the heater stops being energized, liquid coolant material fills the gap thereby rapidly cooling the superconductive connector to below its critical temperature.
    • 磁场发生器具有浸入冷却剂材料中的超导线圈。 当从合适的电源向超导线圈供电时,超导线圈被通电以产生磁场。 然后,超导线圈的端部可以通过持续电流开关短路,以保持磁场而不需要进一步的功率。 持续电流开关具有连接在超导线圈的端部和加热器两端的超导连接。 这些部件被封装在壳体中,这些部件和壳体之间具有间隙。 套管中的孔允许冷却剂材料进入间隙。 当加热器通电时,它加热间隙中的冷却剂材料,直到其蒸发。 然后,通过间隙导热性显着降低,因此超导连接被迅速加热至其临界温度。 只需要低功耗。 当加热器停止通电时,液体冷却剂材料填充间隙,从而将超导连接器快速冷却到其临界温度以下。