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

Year: 2007

Authors: Kraft S.D., Mikosch J., Staanum P., Deiglmayr J., Lange J., Fioretti A., Wester R., Weidemüller M.

Autors Affiliation: Physikalisches Institut, Universität Freiburg, Hermann-Herder-Straße 3, 79104 Freiburg, Germany;
Institut für Quantenoptik, Universität Hannover, Welfengarten 1, 30167 Hannover, Germany
Istituto per i Processi Chimico-Fisici, C.N.R., via Moruzzi 1, 56124 Pisa, Italy

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/Delta m(rms)=1000 at the mass of (133)Cs is achieved. The performance of this spectrometer is demonstrated in the detection of photoassociated ultracold (7)Li(133)Cs molecules near a large signal of (133)Cs ions.

Journal/Review: APPLIED PHYSICS B-LASERS AND OPTICS

Volume: 89 (4)      Pages from: 453  to: 457

KeyWords: cold molecules; time-of-flight; instrumentation
DOI: 10.1007/s00340-007-2855-8

Citations: 11
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