Dresden 2011 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 6: Poster: Cold Molecules
MO 6.2: Poster
Montag, 14. März 2011, 16:00–18:00, P1
A Centrifuge Molecular Decelerator — •Xing Wu, Sotir Chervenkov, Laurens D. van Buuren, Christian Sommer, Joseph Bayerl, Martin Zeppenfeld, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching bei München
We present a new deceleration scheme for neutral polar molecules, which employs the centrifugal potential in a rotating frame. The idea is to launch a continuous beam of polar molecules into a centrifuge decelerator, and electrically guide the molecules [1] from the periphery to the center of the rotating frame along a spiral trajectory. Since the rotational speed is tunable, the centrifuge decelerator can be operated for a wide range of input velocities. The outcoming quasi-continuous, slow, and dense molecular beam is ideal for various applications requiring cold molecules, in particular for loading an electrical trap [2]. In combination with our cryogenic source [3], internally cold molecules will be decelerated. For this setup, simulations show that ammonia beams with velocities below 20 m/s and with fluxes of 109 molecules/s are feasible. We also present our efforts to further improve the flux of cold molecules from our cryogenic source.
[1] S.A. Rangwala et al., Phys. Rev. A 67, 043406 (2003)
[2] M. Zeppenfeld et al., Phys. Rev. A 80, 041401 (2009)
[3] L.D. van Buuren et al., Phys. Rev. Lett. 102, 033001 (2009),
C. Sommer et al., Faraday Discussions 142, 203 (2009)