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Decelerating molecules with microwave fields

MPG-Autoren
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Merz,  Simon
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Vanhaecke,  Nicolas
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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

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Zitation

Merz, S., Vanhaecke, N., Jaeger, W., Schnell, M., & Meijer, G. (2012). Decelerating molecules with microwave fields. Physical Review A, 85(6): 063411. doi:10.1103/PhysRevA.85.063411.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-0010-1509-E
Zusammenfassung
We report on the experimental realization of a microwave decelerator for neutral polar molecules, suitable for decelerating and focusing molecules in high-field-seeking states. The multistage decelerator consists of a cylindrical microwave cavity oscillating in the TE11n mode, with n=12 electric field maxima along the symmetry axis. By switching the microwave field on and off at the appropriate times, a beam of state-selected ammonia molecules with an incident mean velocity of 25 m/s is guided while being spatially focused in the transverse direction and bunched in the forward direction. Deceleration from 20.0 to 16.9 m/s and acceleration from 20.0 to 22.7 m/s are demonstrated.