Berlin 2014 – scientific programme
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MO: Fachverband Molekülphysik
MO 13: Posters 3: Cold Molecules, Helium Nano Droplets, and Experimental Techniques
MO 13.2: Poster
Wednesday, March 19, 2014, 16:30–18:30, Spree-Palais
Combining a continuous centrifuge decelerator with a cryogenic buffer-gas source — •Xing Wu, Sotir Chervenkov, Thomas Gantner, Joseph Bayerl, Martin Zeppenfeld, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching, Germany
The production of large samples of slow molecules with high internal-state purity is still a major challenge in the fast-growing research field of cold molecules. We propose a promising solution by combining a recently demonstrated centrifuge decelerator [1] with a cryogenic buffer-gas source [2]. The centrifuge decelerator is based on the centrifugal potential in a rotating frame, enables a continuous deceleration of molecular beams to almost a standstill, and is applicable to a large range of species. The cryogenic source provides high intensities of internally cold molecules. In order to optimize the flux of the electrically guided beams [3], both the supersonic and the effusive regime of the buffer-gas cooling have been explored. The obtained results indicate that the optimum is achieved in the so-called boosted effusive regime. In combination with the centrifuge decelerator, continuous beams at intensities of several 109s−1mm−2 occupying a minimum number of internal states, and with close-to-zero velocities are conceivable.
[1] S. Chervenkov et al., Phys. Rev. Lett. (in press); arXiv:1311.7119
[2] L.D. van Buuren et al., Phys. Rev. Lett. 102, 033001 (2009)
[3] S.A. Rangwala et al., Phys. Rev. A 67, 043406 (2003)