Hannover 2010 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 28: Poster: Cold Molecules

MO 28.5: Poster

Donnerstag, 11. März 2010, 16:00–18:30, Lichthof

Improved rotating nozzle setup for producing slow and cold molecules — •Matthias Strebel, Marcel Mudrich, and Frank Stienkemeier — Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany

Slow beams of cold molecules are produced by supersonic expansion out of a rapidly rotating nozzle. An improved setup is presented that allows to accelerate or decelerate cold atomic and molecular beams by up to 500 m/s. For enhancing the on - axis beam intensity for polar molecules the beam source is combined with electrostatic fields. The experimental results backed by trajactory simulations yield a relative enhancement of ND₃ and CHF₃ beam density by up to a factor 5 for a linear guide. Different electrode configurations are discussed. In order to investigate reactive and non reactive collisions between atoms and molecules at very low scattering energies, we plan to combine this beam source with a magneto-optic trap (MOT) for ultracold lithium atoms.