Efficient Stark deceleration of cold polar molecules
JILA, National Institute of Standards and Technology and University of Colorado and Department of Physics, University of Colorado, Boulder, Colorado 80309-0440, USA
Corresponding author: a Eric.Hudson@colorado.edu
Published online: 19 October 2004
Stark deceleration has been utilized for slowing and trapping several species of neutral, ground-state polar molecules generated in a supersonic beam expansion. Due to the finite physical dimension of the electrode array and practical limitations of the applicable electric fields, only molecules within a specific range of velocities and positions can be efficiently slowed and trapped. These constraints result in a restricted phase space acceptance of the decelerator in directions both transverse and parallel to the molecular beam axis; hence, careful modeling is required for understanding and achieving efficient Stark decelerator operation. We present work on slowing of the hydroxyl radical (OH) elucidating the physics controlling the evolution of the molecular phase space packets both with experimental results and model calculations. From these results we deduce experimental conditions necessary for efficient operation of a Stark decelerator.
PACS: 32.60.+i – Zeeman and Stark effects / 39.10.+j – Atomic and molecular beam sources and techniques
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004