期刊
APPLIED PHYSICS B-LASERS AND OPTICS
卷 124, 期 2, 页码 -出版社
SPRINGER
DOI: 10.1007/s00340-018-6903-3
关键词
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资金
- DFG through the DIP program within the cluster of excellence PRISMA [SCHM 1049/7-1]
- EU through ENSAR2 RESIST [654002]
We demonstrate the efficient generation of Be+ ions with a 60 ns and 150 nJ laser pulse near 235 nm for two-step photoionization, proven by subsequent counting of the number of ions loaded into a linear Paul trap. The bandwidth and power of the laser pulse are chosen in such a way that a first, resonant step fully saturates the entire velocity distribution of beryllium atoms effusing from a thermal oven. The second excitation step is driven by the same light field causing efficient non-resonant ionization. Our ion-loading scheme has a similar efficiency as compared to former pathways using two-photon continuous wave laser excitation, but with an order of magnitude lower than average UV light power.
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