This paper reports on the use of ultrafast pulses for photoionisation loading of singly-ionised strontium ions in a linear Paul trap. We take advantage of an autoionising resonance of Sr neutral atoms to form Sr + by two-photon absorption of femtosecond pulses at a wavelength of 431 nm. We compare this technique to electron-bombardment ionisation and observe several advantages of photoionisation. It actually allows for the loading of a pure Sr+ ion cloud in a low radio-frequency voltage amplitude regime. In these conditions, up to 4×104 laser-cooled Sr+ ions were trapped. © 2009 Springer-Verlag.
CITATION STYLE
Removille, S., Dubessy, R., Glorieux, Q., Guibal, S., Coudreau, T., Guidoni, L., & Likforman, J. P. (2009). Photoionisation loading of large Sr+ ion clouds with ultrafast pulses. Applied Physics B: Lasers and Optics, 97(1), 47–52. https://doi.org/10.1007/s00340-009-3686-6
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