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

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 an...

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Bibliographic Details
Published in:Applied physics. B, Lasers and optics Lasers and optics, 2007-12, Vol.89 (4), p.453-457
Main Authors: KRAFT, S. D, MIKOSCH, J, STAANUM, P, DEIGLMAYR, J, LANGE, J, FIORETTI, A, WESTER, R, WEIDEMÜLLER, M
Format: Article
Language:English
Subjects:
Atomic and molecular physics
Atomic properties and interactions with photons
Clouds
Deflection
Electrodes
Exact sciences and technology
Ionization
Laser beams
Lasers
Mass spectrometers
Molecular properties and interactions with photons
Optical cooling of atoms
trapping
Optical cooling of molecules
trapping
Photon interactions with atoms
Photon interactions with molecules
Physics
Spectrometers
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Summary: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/ Delta *Dmrms=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.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-007-2855-8