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首页> 外文期刊>Cryogenics >Lessons learned from twenty-year operation of the Large Helical Device poloidal coils made from cable-in-conduit conductors
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Lessons learned from twenty-year operation of the Large Helical Device poloidal coils made from cable-in-conduit conductors

机译：从电缆导通导体制成的大型螺旋装置面块线圈的二十年中汲取的经验教训

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摘要

The Large Helical Device (LHD) superconducting magnet system consists of two pairs of helical coils and three pairs of poloidal coils. The poloidal coils use cable-in-conduit (CIC) conductors, which have now been adopted in many fusion devices, with forced cooling by supercritical helium. The poloidal coils were first energized with the helical coils on March 27, 1998. Since that time, the coils have experienced 54,600 h of steady cooling, 10,600 h of excitation operation, and nineteen thermal cycles for twenty years. During this period, no superconducting-to normal transition of the conductors has been observed. The stable operation of the poloidal coils demonstrates that a CIC conductor is suited to large-scale superconducting magnets. The AC loss has remained constant, even though a slight decrease was observed in the early phase of operation. The hydraulic characteristics have been maintained without obstruction over the entire period of steady cooling. The experience gained from twenty years of operation has also provided lessons regarding malfunctions of peripheral equipment.
机译：大型螺旋装置（LHD）超导磁铁系统由两对螺旋线圈和三对圆形线圈组成。圆形线圈使用电缆导管（CIC）导体，该导体现已在许多融合装置中采用，通过超临界氦气强制冷却。 1998年3月27日，螺旋线圈首先用螺旋线圈通电。由于那个时候，线圈经历了54,600小时的稳定冷却，励磁操作的10,600小时，20多年来的十九个热循环。在此期间，没有观察到导体的超导至正常转变。单极线圈的稳定操作表明CIC导体适用于大规模超导磁体。即使在早期运行期间观察到略微减少，AC损耗仍然是恒定的。在整个稳定冷却的整个时期没有阻碍的情况下保持液压特性。从20多年的运营中获得的经验还提供了关于外围设备故障的教训。

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