日本的JR东海公司与日立制作所协作共同开发成功利用MgB2 超导体制作的 10 0m级超导线材“长尺寸MgB2 超导多芯线材”。这种超导线材 ,较之当前使用的NbTi线材 ,在制造成本和运行费用上要便宜得多 ,今后将进一步进行这种超导线材的实用开发。作为利用MgB2 的超导线材 ,日立等公 JR Tokai Co., Ltd. of Japan, in collaboration with Hitachi Ltd., has jointly developed the “long-length MgB2 superconducting multifilamentary wire” of 100 m grade made of MgB2 superconductor. This superconducting wire material, compared with the current use of NbTi wire, in the manufacturing costs and operating costs to be much cheaper, the further development of this superconducting wire material will be further carried out. As the use of superconducting MgB2 wire, Hitachi and other public