Hannover 2013 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 19: Poster 2: Biomolecules, Cold Molecules, Experimental Techniques, Various Topics
MO 19.13: Poster
Mittwoch, 20. März 2013, 16:00–18:30, Empore Lichthof
A travelling-wave Zeeman decelerator — •Dongdong Zhang1, Jean-Paul Cromières2, Henrik Haak1, Gerard Meijer1, and Nicolas Vanhaecke1,2 — 1Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany — 2Laboratoire Aimé Cotton, CNRS, Université Paris-Sud, 91405 Orsay, France
High-resolution spectroscopy, collision experiments or chemical reaction studies greatly benefit from new methods to trap and cool molecules [1]. One of them, the so-called Zeeman deceleration [2], uses time-dependent, inhomogeneous magnetic fields to control the motion of paramagnetic molecules in a supersonic beam and addresses the highly chemically relevant, broad class of free-radicals.
In our laboratory, a new-concept Zeeman decelerator is being contructed, which produces a traveling magnetic trap with controlable longitudinal velocity and transverse orientation. Atoms and molecules possessing a magnetic dipole moment, in so-called low field seeking states, are trapped around a node of a propagating wave provided that the initial velocity of the wave matches a velocity populated in the supersonic beam. In addition, three dimensional confinement is achieved by controling the radial orientation of the trap, which can be done fully independently from its longitudinal motion.
[1] Topical issue, Chemical Reviews 112(9), 4801-5072 (2012).
[2] N. Vanhaecke, U. Meier, M. Andrist, B. H. Meier, and F. Merkt, Phys. Rev. A 75, 031402(R) (2007).