Hamburg 2009 – scientific programme

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MO: Fachverband Molekülphysik

MO 13: Molekülphysik Poster 1

MO 13.48: Poster

Tuesday, March 3, 2009, 16:30–19:00, VMP 8 Foyer

Velocity filtering of a continuous molecular beam in a curved hexapole guide — •Benjamin Bertsche, Andreas Osterwalder, and Gerard Meijer — Fritz-Haber-Institut, Berlin, Germany

An experiment is presented which extends a method originally introduced by Rangwalla et al. (Phys. Rev. A 67, 043406 (2003)): the filtering of slow dipolar molecules from a thermal gas using the strong electric fields from a multipole guide.

While Rangwalla et al. used static fields from a curved quadrupole to select molecules below a certain threshold velocity, in our current experiment a curved hexapole is employed, and different static and time-dependent electric fields are then used to select molecules with velocities within a certain range. The potential state- and velocity selection by this technique are explored using ammonia (both NH₃ and ND₃), and discussed in comparison with trajectory simulations.