2-photon ionization for efficient seeding and trapping of strontium ions
UCLA Department of Physics and Astronomy, Los Angeles, 90095 California, USA
Corresponding author: a email@example.com
Revised: 2 December 2008
Published online: 9 July 2009
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.
PACS: 32.80.Fb – Photoionization of atoms and ions / 37.10.Ty – Ion trapping
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2009