The present invention relates to a method for manufacturing a tracer-encapsulated solid pellet for magnetic-confinement fusion, the method comprising a liquid droplet formation step of discharging an organic liquid containing an organic solvent into a stabilizing liquid to thereby form liquid droplets 12, and an organic solvent removal step of removing the organic solvent from the liquid droplets 12A. The organic liquid to be used is a liquid having a first organic polymer containing tracer atoms and a second organic polymer being an organic polymer different from the first organic polymer dissolved in the organic solvent, wherein the first organic polymer and the second organic polymer can be mutually phase-separated.

A measurement apparatus for alternating currents and voltages of a physical plasma ignited by applying an alternating high voltage from an alternating high voltage source to a plasma electrode via a high voltage line comprises a current transformer having a measurement winding on a ring core and a cable guide guiding the high voltage line through the ring core. A first measurement alternating voltage dropping over a measurement resistor connected between ends of the measurement winding is a first strictly monotonic increasing function of an amperage of the alternating currents flowing through the high voltage line. A second measurement voltage dropping over a measurement capacitance connected between a center tap of the measurement winding and a reference potential connector is a second strictly monotonic increasing function of an amplitude of the alternating high voltage applied to the plasma electrode with respect to a reference potential at the reference potential connector.