Hannover 2016 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MO: Fachverband Molekülphysik
MO 21: Cold Molecules & Helium Droplets 2
MO 21.2: Vortrag
Freitag, 4. März 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)