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A Linear AC Trap for Polar Molecules in Their Ground State

MPS-Authors
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Schnell,  Melanie
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Lützow,  Peter
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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van Veldhoven,  Jacqueline
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Bethlem,  Hendrick L.
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Küpper,  Jochen
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Friedrich,  Bretislav
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Schleier-Smith,  Monika
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Haak,  Henrik
Molecular Physics, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons21859

Meijer,  Gerard
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Fulltext (public)

319122.pdf(Schnell).pdf
(Preprint), 21MB

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Citation

Schnell, M., Lützow, P., van Veldhoven, J., Bethlem, H. L., Küpper, J., Friedrich, B., et al. (2007). A Linear AC Trap for Polar Molecules in Their Ground State. The Journal of Physical Chemistry A, 111(31), 7411-7419. Retrieved from http://pubs.acs.org/cgi-bin/abstract.cgi/jpcafh/2007/111/i31/abs/jp070902n.html.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0011-000A-2
Abstract
A linear AC trap for polar molecules in high-field seeking states has been devised and implemented, and its characteristics have been investigated both experimentally and theoretically. The trap is loaded with slow 15ND₃ molecules in their ground state (para-ammonia) from a Stark decelerator. The trap's geometry offers optimal access as well as improved loading. We present measurements of the dependence of the trap's performance on the switching frequency, which exhibit a characteristic structure due to nonlinear resonance effects. The molecules are found to oscillate in the trap under the influence of the trapping forces, which were analyzed using 3D numerical simulations. On the basis of expansion measurements, molecules with a velocity and a position spread of 2.1 m/s and 0.4 mm, respectively, are still accepted by the trap. This corresponds to a temperature of 2.0 mK. From numerical simulations, we find the phase-space volume that can be confined by the trap (the acceptance) to be 50 mm³ (m/s)³.