Details
| Original language | English |
|---|---|
| Article number | 083026 |
| Pages (from-to) | 083026 |
| Journal | New journal of physics |
| Volume | 25 |
| Issue number | 8 |
| Publication status | Published - 14 Aug 2023 |
| Externally published | Yes |
Abstract
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.
Keywords
- nuclear laser excitation, trapped ions, VUV laser
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: New journal of physics, Vol. 25, No. 8, 083026, 14.08.2023, p. 083026.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Vacuum-ultraviolet laser source for spectroscopy of trapped thorium ions
AU - Thielking, J
AU - Zhang, K
AU - Tiedau, J
AU - Zander, J
AU - Zitzer, G
AU - Okhapkin, M v
AU - Peik, Ekkehard
N1 - Publisher Copyright: © 2023 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft.
PY - 2023/8/14
Y1 - 2023/8/14
N2 - 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.
AB - 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.
KW - nuclear laser excitation
KW - trapped ions
KW - VUV laser
UR - http://www.scopus.com/inward/record.url?scp=85168559072&partnerID=8YFLogxK
U2 - 10.1088/1367-2630/aced1b
DO - 10.1088/1367-2630/aced1b
M3 - Article
VL - 25
SP - 083026
JO - New journal of physics
JF - New journal of physics
SN - 1367-2630
IS - 8
M1 - 083026
ER -