Abstract
We describe an efficient way to photoionize strontium atoms in a linear radio-frequency trap. We use a 2-photon second order process to excite the autoionization resonance (4d2+5p2) 1D2 in neutral strontium (Sr). A doubled Ti:sapphire laser system is used at 431 nm to provide 100 fs pulses at 82 MHz. The fabrication of the laser systems for addressing the Sr+ transitions necessary for laser cooling and excitation of quantum jumps, vacuum system and ion trap structure are also described. With the current setup a easy and repeatable trapping of linear ion chains is readily achieved at very low Sr vapor pressures.
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Kirilov, E., Putterman, S. 2-photon ionization for efficient seeding and trapping of strontium ions. Eur. Phys. J. D 54, 683–691 (2009). https://doi.org/10.1140/epjd/e2009-00197-2
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DOI: https://doi.org/10.1140/epjd/e2009-00197-2