Hello all, i'm in the process of designing my own electromagnets, and would like to know the benefits(if any) of using superconducting wire at 77K( liquid nitrogen cooled) rather than an equivalent length of copper wire cooled to those temperatures in creating a solenoid. Because the critical current of commercially available High Temp Superconducting wire at 77K is only around 120 A, and the thinnest diameter i can find is about 3mm, am i better off going with regular copper wire and using higher currents and just cool it with liquid nitrogen(or some other system, I'm thinking liquid N2 might be unsafe due to a fast rate of evaporation)? Is the magnetic field produced by a superconductor at a given current much larger than that in a copper coil at the same current? Or is it the same? Also, if the field produced is larger, how much larger is it and why is it producing a larger B field?