Velocity map imaging of a slow beam of ammonia molecules inside a quadrupole guide

M. Quintero Perez, P. Jansen, H.L. Bethlem

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Velocity map imaging inside an electrostatic quadrupole guide is demonstrated. By switching the voltages that are applied to the rods, the quadrupole can be used for guiding Stark decelerated molecules and for extracting the ions. The extraction field is homogeneous along the axis of the quadrupole, while it defocuses the ions in the direction perpendicular to both the axis of the quadrupole and the axis of the ion optics. To compensate for this astigmatism, a series of planar electrodes with horizontal and vertical slits is used. A velocity resolution of 35 m s
Original languageEnglish
Pages (from-to)9630-9635
JournalPhysical Chemistry Chemical Physics - PCCP
Volume14
Issue number27
DOIs
Publication statusPublished - 2012

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