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  Operation of a Stark decelerator with optimum acceptance

Scharfenberg, L., Haak, H., Meijer, G., & Meerakker, S. Y. T. v. d. (2009). Operation of a Stark decelerator with optimum acceptance. Physical Review A, 79(2), 023410-1-023410-11. doi:10.1103/PhysRevA.79.023410.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0010-FA0F-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0010-FA10-3
Genre: Journal Article

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 Creators:
Scharfenberg, Ludwig1, Author              
Haak, Henrik1, Author              
Meijer, Gerard1, Author              
Meerakker, Sebastiaan Y. T. van de1, Author              
Affiliations:
1Molecular Physics, Fritz Haber Institute, Max Planck Society, ou_634545              

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Free keywords: free radicals, molecular beams, oxygen compounds, Stark effect
 Abstract: With a Stark decelerator, beams of neutral polar molecules can be accelerated, guided at a constant velocity, or decelerated. The effectiveness of this process is determined by the six-dimensional (6D) volume in phase space from which molecules are accepted by the Stark decelerator. Couplings between the longitudinal and transverse motion of the molecules in the decelerator can reduce this acceptance. These couplings are nearly absent when the decelerator operates such that only every third electric-field stage is used for deceleration, while extra transverse focusing is provided by the intermediate stages. For many applications, the acceptance of a Stark decelerator in this so-called s=3 mode significantly exceeds that of a decelerator in the conventionally used (s=1) mode. This has been experimentally verified by passing a beam of OH radicals through a 2.6-m-long Stark decelerator. The experiments are in quantitative agreement with the results of trajectory calculations, and can qualitatively be explained with a simple model for the 6D acceptance. These results imply that the 6D acceptance of a Stark decelerator in the s=3 mode of operation approaches the optimum value, i.e., the value that is obtained when any couplings are neglected.

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Language(s): eng - English
 Dates: 2009-02-06
 Publication Status: Published in print
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 Rev. Method: Peer
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Title: Physical Review A
  Alternative Title : Phys. Rev. A
Source Genre: Journal
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Pages: - Volume / Issue: 79 (2) Sequence Number: - Start / End Page: 023410-1 - 023410-11 Identifier: -