The construction and operation of a prototype high- T c superconducting train model is presented. The train is levitated by a melt-processed GdBa 2 Cu 3 O x (Gd-123) superconducting material over a magnetic rail (track). The oval shaped track is constructed in S-N-S or PM3N configuration arranged on an iron plate. The train bodies are constructed with FRP sheets forming a vessel to maintain the temperature of liquid nitrogen. The superconductors are field-cooled on the magnetic track, which provides a large stability of the levitation due to strong flux pinning of the melt-processed superconductors. The setup enables to test parameters like stability, speed, and safety, of the superconducting train for various gaps (ranging between 1 mm to 15 mm) between the train and the magnetic track. The experimental results indicate that trains with 1 to 2 mm gaps cannot run properly due to the friction applied to the track. The trains with 10 or 15 mm gaps do not run stable on the track. Our results confirm that a gap of 5 mm is the optimum distance to run the train showing also stability to run fast on the track. The present results clearly demonstrate that the stability of the superconducting trains depends on the gap between the rail and train, which is an important parameter also for the real Maglev trains.
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机译：介绍了原型高T c超导列车模型的构建和运行。火车在磁轨（轨道）上经过熔融处理的GdBa 2 Cu 3 O x（Gd-123）超导材料悬浮。椭圆形轨道以S-N-S或PM3N构造构造，布置在铁板上。列车车体由FRP板构成，形成一个容器以保持液氮的温度。超导体在磁道上进行现场冷却，由于熔融加工的超导体的强磁通钉扎作用，因此提供了很大的悬浮稳定性。该设置可以测试超导列车在列车与磁道之间的各种间隙（范围在1毫米至15毫米之间）中的参数，如稳定性，速度和安全性。实验结果表明，由于施加到轨道上的摩擦力，具有1至2 mm间隙的列车无法正常运行。间距为10或15毫米的火车在轨道上运行不稳定。我们的结果证实，5 mm的间隙是运行火车的最佳距离，也显示了在轨道上快速运行的稳定性。目前的结果清楚地表明，超导列车的稳定性取决于轨道与列车之间的间隙，这对于实际的磁悬浮列车也是一个重要参数。
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