Efficient Stark deceleration of cold polar molecules

Details Efficient Stark deceleration of cold polar molecules Efficient Stark deceleration of cold polar molecules

2004-07-02

arxiv.org/abs/physics/0407013v1

Physics

Atomic Physics

8 pages, 9 figures

Scientific paper

10.1140/epjd/e2004-00138-7

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.

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