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Impossibility of a biased Stark trap in two dimensions Samuel A. Meek, E. R. I. Abraham, and Neil E. Shafer-Ray
 

Summary: Impossibility of a biased Stark trap in two dimensions
Samuel A. Meek, E. R. I. Abraham, and Neil E. Shafer-Ray
The University of Oklahoma, Norman, Oklahoma 73019, USA
Received 11 March 2005; published 29 June 2005
We show that it is impossible to create a two-dimensional static electric field E with a local minimum in E2
at a point in space for which E 0. This fact may have consequences in the design of state selectors and guides
of slow-moving molecules.
DOI: 10.1103/PhysRevA.71.065402 PACS number s : 32.80.Pj, 41.20.Cv
The production of slow-moving ground-state polar mol-
ecules can be achieved by several means, including photoas-
sociation, decceleration of a molecular beam using a travel-
ing potential well, and He buffer gas cooling 1 . A long
straight electrostatic guide previously used as a molecular
beam state selector 2 has many applications to ultracold
molecular physics, including the transport of molecules from
one vacuum chamber to another, high-resolution spectros-
copy of guided molecules, and ultracold collisions. The spa-
tial dependence of a static electric field E leads to a local
minimum in the Stark energy at the center of a long straight
guide. A population of slow moving molecules in low field

  

Source: Abraham, Eric - Department of Physics and Astronomy, University of Oklahoma

 

Collections: Physics