Berlin 2014 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
MO: Fachverband Molekülphysik
MO 14: Cold Molecules 2
MO 14.5: Talk
Thursday, March 20, 2014, 11:30–11:45, BEBEL HS213
Transverse Focusing Effects in the Zeeman Deceleration of Hydrogen Atoms — •Katrin Dulitz1, Atreju Tauschinsky1, Michael Motsch2, Nicolas Vanhaecke3,4, and Timothy P. Softley1 — 1Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK — 2Laboratorium für Physikalische Chemie, ETH Zürich, Wolfgang-Pauli-Straße 10, 8093 Zürich, Switzerland — 3Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany — 4Laboratoire Aimé Cotton, CNRS, Université Paris-Sud, ENS Cachan, 91405 Orsay, France
Zeeman deceleration is an experimental technique in which inhomogeneous, time-dependent magnetic fields inside an array of solenoid coils are used to manipulate the velocity of a supersonic beam [1, 2]. We have built and characterised a 12-stage Zeeman decelerator for hydrogen atoms in Oxford. We present experimental results illustrating that the overall acceptance in a Zeeman decelerator can be significantly increased by applying a low, anti-parallel magnetic field to one of the coils so as to form a temporally varying quadrupole field which improves transverse particle confinement [3]. The results show excellent agreement with three-dimensional numerical particle trajectory simulations, and they suggest the use of a modified coil configuration to improve transverse focusing during the deceleration process.
N. Vanhaecke et al., Phys. Rev. A 75, 031402 (2007).
[2] E. Narevicius et al., Phys. Rev. A 77, 051401 (2008).
[3] K. Dulitz, M. Motsch, N. Vanhaecke, T. P. Softley, submitted.