Direct Measurement of the Hyperfine Structure Interval of Positronium Using High-Power Millimeter Wave Technology (Springer Theses) - Hardcover

Miyazaki, Akira

 
9784431556053: Direct Measurement of the Hyperfine Structure Interval of Positronium Using High-Power Millimeter Wave Technology (Springer Theses)
Hardcover
ISBN 10: 4431556052 ISBN 13: 9784431556053
Verlag: Springer, 2015

Inhaltsangabe

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.

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Über die Autorin bzw. den Autor

Dr. Akira Miyazaki
Department of Physics, The University of Tokyo
miyazaki@icepp.s.u-tokyo.ac.jp

Von der hinteren Coverseite

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.

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Verlag
Springer
Erscheinungsdatum
2015
Sprache
Englisch
ISBN 10 
4431556052
ISBN 13 
9784431556053
Einband
Gebundene Ausgabe
Anzahl der Seiten
135
Kontakt zum Hersteller
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9784431564058: Direct Measurement of the Hyperfine Structure Interval of Positronium Using High-Power Millimeter Wave Technology (Springer Theses)

Vorgestellte Ausgabe

ISBN 10:  4431564055 ISBN 13:  9784431564058
Verlag: Springer, 2016
Softcover