König, Kristian Lars (2019)
Laser-Based High-Voltage Metrology with ppm Accuracy.
Technische Universität Darmstadt
Dissertation, Erstveröffentlichung
Kurzbeschreibung (Abstract)
A beamline for high-precision collinear laser spectroscopy was designed, constructed and commissioned within this work. The main aspect was the development of a technique for a precise high-voltage determination with an accuracy in the sub-ppm regime. It is based on the laser-spectroscopic measurement of an ion velocity after acceleration with the high-voltage of interest by the determination of the Doppler shifted transition frequency. With an accurate knowledge of the rest-frame transition frequency and the mass, the high-voltage of interest can be traced back on natural constants like the speed of light and the elementary charge as well as on the measurement of a laser frequency. Since the laser frequency can be accurately determined with a frequency comb, this technique fulfills the requirements for the definition of a quantum standard. In first measurements with Ca⁺ and In⁺ ions, accuracies in the determination of high voltages between 1 kV and 20 kV of the order of 5 ppm were demonstrated. This corresponds to an increase in precision by a factor of 20 compared to earlier attempts and is mainly achieved by the improved experimental setup and the newly developed two-chamber approach with reference measurements. Further improvements of the laser stabilization scheme and of the laser-ion beam superposition that have been realized within this work, have the potential to enable laser-based high-voltage evaluations with uncertainties below 1 ppm. This would outperform the conventional technique based on high-voltage dividers and yield an unprecedented accuracy whereof several applications in metrology and science can benefit.
Typ des Eintrags: | Dissertation | ||||
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Erschienen: | 2019 | ||||
Autor(en): | König, Kristian Lars | ||||
Art des Eintrags: | Erstveröffentlichung | ||||
Titel: | Laser-Based High-Voltage Metrology with ppm Accuracy | ||||
Sprache: | Englisch | ||||
Referenten: | Nörtershäuser, Prof. Dr. Wilfried ; Kröll, Prof. Dr. Thorsten | ||||
Publikationsjahr: | 2019 | ||||
Ort: | Darmstadt | ||||
Datum der mündlichen Prüfung: | 10 Dezember 2018 | ||||
URL / URN: | https://tuprints.ulb.tu-darmstadt.de/8401 | ||||
Kurzbeschreibung (Abstract): | A beamline for high-precision collinear laser spectroscopy was designed, constructed and commissioned within this work. The main aspect was the development of a technique for a precise high-voltage determination with an accuracy in the sub-ppm regime. It is based on the laser-spectroscopic measurement of an ion velocity after acceleration with the high-voltage of interest by the determination of the Doppler shifted transition frequency. With an accurate knowledge of the rest-frame transition frequency and the mass, the high-voltage of interest can be traced back on natural constants like the speed of light and the elementary charge as well as on the measurement of a laser frequency. Since the laser frequency can be accurately determined with a frequency comb, this technique fulfills the requirements for the definition of a quantum standard. In first measurements with Ca⁺ and In⁺ ions, accuracies in the determination of high voltages between 1 kV and 20 kV of the order of 5 ppm were demonstrated. This corresponds to an increase in precision by a factor of 20 compared to earlier attempts and is mainly achieved by the improved experimental setup and the newly developed two-chamber approach with reference measurements. Further improvements of the laser stabilization scheme and of the laser-ion beam superposition that have been realized within this work, have the potential to enable laser-based high-voltage evaluations with uncertainties below 1 ppm. This would outperform the conventional technique based on high-voltage dividers and yield an unprecedented accuracy whereof several applications in metrology and science can benefit. |
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Alternatives oder übersetztes Abstract: |
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URN: | urn:nbn:de:tuda-tuprints-84014 | ||||
Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik | ||||
Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Kernphysik 05 Fachbereich Physik > Institut für Kernphysik > Experimentelle Kernphysik 05 Fachbereich Physik > Institut für Kernphysik > Experimentelle Kernphysik > Atom- und Kernphysik radioaktiver Nuklide |
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Hinterlegungsdatum: | 24 Feb 2019 20:55 | ||||
Letzte Änderung: | 24 Feb 2019 20:55 | ||||
PPN: | |||||
Referenten: | Nörtershäuser, Prof. Dr. Wilfried ; Kröll, Prof. Dr. Thorsten | ||||
Datum der mündlichen Prüfung / Verteidigung / mdl. Prüfung: | 10 Dezember 2018 | ||||
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