Superconducting magnets refer to the general term for superconducting coils and its maintenance of low temperature containers. Superconducting magnets are the most important core components of the superconducting suspended railway. The promotion, suspension, and guidance of vehicles are generated by the superconducting coil. Like permanent magnets, superconducting magnets can provide stable magnetic fields, and superconducting magnets can also provide high -strength magnetic fields that general permanent magnets cannot provide. This is also the reason why the magnetic floating railway uses superconducting magnets. Due to the development of high -temperature superconductors, superconducting phenomena is generated under the temperature of liquid nitrogen (78K), which greatly improves the performance of superconducting materials. However, as a superconducting material used as a magnetic floating railway, the critical currents of high -temperature superconducting materials in high -strength magnetic fields cannot meet the requirements.

At 8 am in September 19, 2007, the Beijing spectrometer superconducting magnet of the large particle detector of the major renovation project (BEPCI) of the Beijing positive and negative electronic collision machine (BEPC II) successfully reached 10,000 high (20,000 times the earth magnetic field), and the current reached reached 3368 Ampeter, the maximum energy storage reaches 10 million coke ear, and has reached design indicators. The superconducting magnet was independently developed by the Institute of High Energy Physics of the Chinese Academy of Sciences. It is one of the key components of the Beijing spectrometer, mainly including superconducting coils, low temperature thermostats, cold substances and electromagnetic suspension support structures and valve boxes.