Cooling of HTS magnets with solid nitrogen

The review summarizes some domestic and international publications for 2018 – 2023 devoted to the cooling of superconducting devices by means of solid nitrogen. The scope of possible application of this traditional coolant in an unusual phase condition is very extensive. Today, scientists from different countries use solid nitrogen to cool prototypes of high-temperature superconducting magnets intended for electric aircraft motors, magnetic separators, inductive energy storage devices, high-speed Maglev trains, NMR spectrometers, etc. The review briefly describes methods for creating an operating temperature of 10 – 60 K, the main characteristics of HTS devices in solid nitrogen, as well as pros & cons and prospects of this relatively new solution in cryogenics.