Electromagnetic apparatus used to generate or measure magnetic fields; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling the distribution or use of electricity, namely, cryostats, poloidal diverters, superconducting toroidals, superconducting poloidals, and plasma injectors; apparatus and instruments for scientific or research purposes, in the field of energy conduction, transformation, accumulation, regulation, and distribution, namely, apparatus and instruments for measuring the presence and composition of fusion energy, and plasma, and diagnostic apparatus for detecting the presence of fusion energy and plasma; superconducting magnet power supply, electromagnet power supply, and electromagnets