Efficient Photoionization-Loading of Trapped Cadmium Ions with Ultrafast Pulses

Deslauriers, L, Acton, M, Blinov, B B, Brickman, K-A, Haljan, P C, Hensinger, W K, Hucul, D, Katnik, S, Kohn Jr, R N, Lee, P J, Madsen, M J, Maunz, P, Olmschenk, S, Moehring, D L, Stick, D, Sterk, J, Yeo, M, Younge, K C and Monroe, C (2006) Efficient Photoionization-Loading of Trapped Cadmium Ions with Ultrafast Pulses. Physical Review A, 74 (6). 063421. ISSN 1050-2947

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Atomic cadmium ions are loaded into radiofrequency ion traps by photoionization of atoms in a cadmium vapor with ultrafast laser pulses. The photoionization is driven through an intermediate atomic resonance with a frequency-quadrupled mode-locked Ti:sapphire laser that produces pulses of either 100-fs or 1-ps duration at a central wavelength of 229 nm. The large bandwidth of the pulses photoionizes all velocity classes of the Cd vapor, resulting in a high loading efficiency compared to previous ion trap loading techniques. Measured loading rates are compared with a simple theoretical model, and we conclude that this technique can potentially ionize every atom traversing the laser beam within the trapping volume. This may allow the operation of ion traps with lower levels of background pressures and less trap electrode surface contamination. The technique and laser system reported here should be applicable to loading most laser-cooled ion species.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Depositing User: Winfried Hensinger
Date Deposited: 06 Feb 2012 19:58
Last Modified: 03 Jul 2019 00:32
URI: http://sro.sussex.ac.uk/id/eprint/23249

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