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A high-resolution time-of-flight mass spectrometer for the detection of ultracold molecules

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Abstract

We have realized a high-resolution time-of-flight mass spectrometer combined with a magneto-optical trap. The spectrometer enables excellent optical access to the trapped atomic cloud using specifically devised acceleration and deflection electrodes. The ions are extracted along a laser beam axis and deflected onto an off-axis detector. The setup is applied to detect atoms and molecules photoassociated from ultracold atoms. The detection is based on resonance-enhanced multi-photon ionization. Mass resolution up to m/Δmrms=1000 at the mass of 133Cs is achieved. The performance of this spectrometer is demonstrated in the detection of photoassociated ultracold 7Li133Cs molecules near a large signal of 133Cs ions.

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Authors and Affiliations

  1. Physikalisches Institut, Universität Freiburg, Hermann-Herder-Straße 3, 79104, Freiburg, Germany

    S.D. Kraft, J. Mikosch, P. Staanum, J. Deiglmayr, J. Lange, R. Wester & M. Weidemüller

  2. Institut für Quantenoptik, Universität Hannover, Welfengarten 1, 30167, Hannover, Germany

    P. Staanum

  3. Istituto per i Processi Chimico-Fisici, C.N.R., via Moruzzi 1, 56124, Pisa, Italy

    A. Fioretti

Authors
  1. S.D. Kraft
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  2. J. Mikosch
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  3. P. Staanum
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  4. J. Deiglmayr
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  5. J. Lange
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  6. A. Fioretti
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  7. R. Wester
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  8. M. Weidemüller
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Correspondence to S.D. Kraft.

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07.75.+h; 32.80.Rm; 37.10.Gh

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Kraft, S., Mikosch, J., Staanum, P. et al. A high-resolution time-of-flight mass spectrometer for the detection of ultracold molecules. Appl. Phys. B 89, 453–457 (2007). https://doi.org/10.1007/s00340-007-2855-8

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  • DOI: https://doi.org/10.1007/s00340-007-2855-8

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