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Hannover 2016 – scientific programme

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MO: Fachverband Molekülphysik

MO 21: Cold Molecules & Helium Droplets 2

MO 21.2: Talk

Friday, March 4, 2016, 11:30–11:45, f142

The Cryofuge: Deceleration of buffer-gas-cooled polar molecules — •Thomas Gantner, Xing Wu, Sotir Chervenkov, Martin Zeppenfeld, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching, Germany

We present a general technique to produce an intense, continous, guided beam of rotationally and motionally cold molecules. The molecules are first cooled in a cryogenic buffer gas cell [1] and then extracted and guided by an electrostatic quadrupole guide [2] to the centrifuge decelerator [3]. There, they are slowed down by employing the centrifugal force in a rotating quadrupole guide. Finally, they are detected by a quadrupole mass spectrometer. We demonstrate the deceleration of various molecules (CH3F and CF3CCH), achieving fluxes of about 1010 molecules/s with internal-state purity above 90% at velocities below 20 m/s by varying the settings of the buffer gas cell as well as the centrifuge rotation frequency.

[1] L.D. van Buuren et al., Phys. Rev. Lett. 102, 033001 (2009)

[2] S.A. Rangwala et al., Phys. Rev. A 67, 043406 (2003)

[3] S. Chervenkov et al., Phys. Rev. Lett. 112, 013001 (2014)

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