Slow ammonia molecules in an electrostatic quadrupole guide

T. Junglen*, T. Rieger, S. A. Rangwala, P. W H Pinkse, G. Rempe

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

57 Citations (Scopus)


An electrostatic quadropole is used to filter slow dipolar ND3 molecules from an effusive source and to guide them into ultrahigh vacuum. The molecules in the electrostatic quadrupole experience a Stark interaction which allows filtering of small velocities in the linear and bent sections of the quadrupole. With this technique we demonstrate a flux of ≈ 1010/s with a longitudinal temperature of a few K. The technique and the set-up are discussed in detail, and the guided gas as well as the output beam are characterized. Improvements in the set-up are highlighted, as for instance cooling of the effusive source to below 150 K.

Original languageEnglish
Pages (from-to)365-373
Number of pages9
JournalEuropean Physical Journal D. Atomic, Molecular, Optical and Plasma Physics
Issue number2
Publication statusPublished - 1 Nov 2004
Externally publishedYes


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