| Zugriffsnummer | 50346 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Vacuum-ultraviolet laser source for spectroscopy of trapped thorium ions |
| Autor(in); Institution | |
| Quelle/Jahr | New Journal of Physics: 25 (2023), 1 - 9 |
| Artikelnummer | 083026 |
| Availability | [online only] |
| ISSN | 1367-2630 (online) |
| DOI | |
| Verlag | Bristol: IOP Publishing |
| Freie Schlagworte | VUV Laser ; trapped ions ; nuclear laser excitation |
| Zusammenfassung | A tunable vacuum-ultraviolet (VUV) laser source based on four-wave frequency mixing in xenon is presented. Using seed radiation from two continuous-wave lasers, the system allows for precise control of the VUV frequency and is developed for the resonant laser excitation of the Th-229 nucleus to its low-energy isomeric state. The system is prepared to operate in a wide scanning range from 148 nm to 155 nm. The source produces pulses of 6-10 ns duration with up to 40 μJ energy and is coupled via a vacuum beamline to a linear radiofrequency ion trap. In a first implementation of VUV laser spectroscopy of trapped Th+ ions we excite three previously unknown resonance lines near 149 nm wavelength to electronic levels that are close to the Th-229 isomer energy. The resonances are detected and analyzed via fluorescence of the excited Th+ ions. An analysis of the lineshape is used to estimate the linewidth of the VUV radiation to be in the range of ≤6 GHz, dominated by phase noise that is enhanced in harmonic generation and in the four-wave mixing process. The prospects for the use of the system in nuclear laser spectroscopy of Th-229 are discussed. |
| Relation |
https://doi.org/10.5281/zenodo.8220302 – (The data that support the findings of this study are openly available)
|
| Kostenfreier Zugang | Open Access Gold |
| Rechteinformation | CC BY 4.0 ; Creative Commons Attribution 4.0 License |
| Themenbereich der Metrologie | Zeit und Frequenz |
| Innovationscluster | Quantentechnologie |
| Geschäftsfelder | Grundlagen der Metrologie |
| Förderinformationen (1) |
Förderername: European Research Council (ERC)
Förderer ID: 0000 0000 8923 0953 Förderer ID Typ: ISNI Förderprogramm: European Union's Horizon 2020 research and innovation programme Förderungsnummer: 856415 |
| Förderinformationen (2) |
Förderername: Deutsche Forschungsgemeinschaft (DFG)
Förderer ID: 0000 0001 2096 9829 Förderer ID Typ: ISNI Förderprogramm: SFB 1227 Titel der Förderung: Project B04 Förderungsnummer: 274200144 |
| Förderinformationen (3) | Förderername: Max-Planck, RIKEN, PTB Center for Time, Constants, and Fundamental Symmetries (C-TCFS) |