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By Akira Miyazaki

during this thesis, the writer develops new high-power millimeter wave ideas for measuring the hyperfine constitution of positronium (Ps-HFS) at once for the 1st time on the planet. oblique size of Ps-HFS within the literature may need systematic uncertainties regarding using a static magnetic box. improvement of the millimeter wave units helps the best decision of Ps-HFS by way of at once measuring the Breit-Wigner resonant transition from o-Ps to p-Ps with out the magnetic box. while, the width of the measured Breit-Wigner resonance without delay offers the life of p-Ps. This dimension is the 1st exact spectroscopic scan concerning the magnetic dipole transition and high-power millimeter waves. the improvement of a gyrotron and a Fabry-Pérot hollow space is defined as offering an efficient energy of over 20 kW, that is required to reason the direct transition from o-Ps to p-Ps. these values measured by means of the newly constructed millimeter wave gadget pave the best way for reading the discrepancy saw among traditional oblique experiments on Ps-HFS and the theoretical predictions of Quantum Electrodynamics.

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