A velocity map imaging detector with an integrated gas injection system

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Title A velocity map imaging detector with an integrated gas injection system
Author Ghafur, Omair; Siu, W.; Johnsson, P.; Kling, M. F.; Drescher, M.; Vrakking, M. J. J.
Journal Name Review of Scientific Instruments
Year Published 2009
Place of publication United States
Publisher American Institute of Physics
Abstract We present the design of a velocity map imaging spectrometer where the target gas is injected from a capillary that is integrated in the repeller plate of the ion optics assembly that drives electrons/ions formed by ionization or dissociation to a two-dimensional detector. The geometry of this design allows the use of gas densities in the interaction region that are two to three orders of magnitude higher than the densities that are used in standard velocity map imaging spectrometers, making the detector suitable for working with weak light sources such as newly developed attosecond pulse sources, or (quasi-)cw sources such as synchrotrons. In a test where monoenergetic photoelectrons were generated by six-photon ionization of Xe (utilizing the second harmonic of a neodymium doped Nd:YAG), the kinetic energy resolution of the spectrometer was found to be Delta E/E=1.8%. This number was found to be in good agreement with Monte Carlo simulations.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1063/1.3085799
Volume 80
Issue Number 3
Page from 033110-1
Page to 033110-6
ISSN 1089-7623
Date Accessioned 2012-01-12; 2012-02-13T05:09:21Z
Date Available 2012-02-13T05:09:21Z
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Atomic and Molecular Physics
URI http://hdl.handle.net/10072/42491
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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