In this thesis, the author develops new high-power millimeter wave techniques for measuring the hyperfine structure of positronium (Ps-HFS) directly for the first time in the world. Indirect measurement of Ps-HFS in the literature might have systematic uncertainties related to the use of a static magnetic field. Development of the millimeter wave devices supports the precise determination of Ps-HFS by directly measuring the Breit-Wigner resonant transition from o-Ps to p-Ps without the magnetic field. At the same time, the width of the measured Breit-Wigner resonance directly provides the lifetime of p-Ps. This measurement is the first precise spectroscopic experiment involving the magnetic dipole transition and high-power millimeter waves. The development of a gyrotron and a Fabry-Pérot cavity is described as providing an effective power of over 20 kW, which is required to cause the direct transition from o-Ps to p-Ps. Those values measured by the newly developed millimeter wave device pave the way for examining the discrepancy observed between conventional indirect experiments on Ps-HFS and the theoretical predictions of Quantum Electrodynamics.
| ISBN: | 9784431564058 |
| Publication date: | 29th October 2016 |
| Author: | Akira Miyazaki |
| Publisher: | Springer an imprint of Springer Japan |
| Format: | Paperback |
| Pagination: | 122 pages |
| Series: | Springer Theses |
| Genres: |
Atomic and molecular physics Nuclear physics Scientific standards, measurement etc |
In this thesis, the author develops new high-power millimeter wave techniques for measuring the hyperfine structure of positronium (Ps-HFS) directly for the first time in the world. Indirect measurement of Ps-HFS in the literature might have systematic uncertainties related to the use of a static magnetic field. Development of the millimeter wave devices supports the precise determination of Ps-HFS by directly measuring the Breit-Wigner resonant transition from o-Ps to p-Ps without the magnetic field. At the same time, the width of the measured Breit-Wigner resonance directly provides the lifetime of p-Ps. This measurement is the first precise spectroscopic experiment involving the magnetic dipole transition and high-power millimeter waves. The development of a gyrotron and a Fabry-Pérot cavity is described as providing an effective power of over 20 kW, which is required to cause the direct transition from o-Ps to p-Ps. Those values measured by the newly developed millimeter wave device pave the way for examining the discrepancy observed between conventional indirect experiments on Ps-HFS and the theoretical predictions of Quantum Electrodynamics.
Direct Measurement of the Hyperfine Structure Interval of Positronium Using High-Power Millimeter Wave Technology features in the following genres: Atomic and molecular physics, Nuclear physics, Scientific standards, measurement etc
Direct Measurement of the Hyperfine Structure Interval of Positronium Using High-Power Millimeter Wave Technology is available in Paperback, Hardback
Direct Measurement of the Hyperfine Structure Interval of Positronium Using High-Power Millimeter Wave Technology was written by Akira Miyazaki and published by Springer an imprint of Springer Japan
Direct Measurement of the Hyperfine Structure Interval of Positronium Using High-Power Millimeter Wave Technology has 122 pages
Yes it is part of Springer Theses series