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Efficient and robust photo-ionization loading of beryllium ions

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Abstract

We demonstrate the efficient generation of \(\hbox {Be}^+\) ions with a 60 ns and 150 nJ laser pulse near 235 nm for two-step photo-ionization, 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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Notes

  1. Clark-MXR Orc-1000

  2. Roditi International Corporation

  3. with a total of four different laser mirror sets

  4. Crysmit Photonics Co

  5. Thorlabs, HL63133DG

  6. Toptica, HF-ANGSTROM WS/U-30U

  7. the beam diameters are calculated according to ISO 11145

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Acknowledgements

We acknowledge support from the DFG through the DIP program (Grant no. SCHM 1049/7-1), within the cluster of excellence PRISMA and from the EU through ENSAR2 RESIST (Grant no. 654002).

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Authors and Affiliations

  1. QUANTUM, Institut für Physik, Johannes Gutenberg Universität, Mainz, Germany

    Sebastian Wolf, Dominik Studer, Klaus Wendt & Ferdinand Schmidt-Kaler

Authors
  1. Sebastian Wolf
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  2. Dominik Studer
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  3. Klaus Wendt
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  4. Ferdinand Schmidt-Kaler
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Correspondence to Sebastian Wolf.

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Wolf, S., Studer, D., Wendt, K. et al. Efficient and robust photo-ionization loading of beryllium ions. Appl. Phys. B 124, 30 (2018). https://doi.org/10.1007/s00340-018-6903-3

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