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MO: Fachverband Molekülphysik
MO 5: Experimental Techniques
MO 5.2: Vortrag
Montag, 12. März 2012, 16:45–17:00, V38.02
Characterisation of a high resolution spatial map ion imaging setup — Johannes von Vangerow1, •Martin Stei1, Aditya Kelkar1, Rico Otto1,2, Thorsten Best1, and Roland Wester1 — 1Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck — 2now at: Department of Chemistry, University of California, San Diego
Over the past decade velocity map imaging (VMI) [1] has emerged as a well established and widely used technique for studying molecular reaction dynamics. The electrostatic lens arrangement of a VMI spectrometer also provides the flexibility to operate in spatial map imaging (SMI) mode. In recent years efforts have been directed towards applying the SMI technique for imaging biological tissue as well as for beam profiling of neutral, ion and laser beams [2,3]. However, a detailed characterisation in terms of resolution and imaging properties is still missing. Here we report the characterisation of the spatial map imaging mode of our 3D VMI spectrometer using multi-photon ionisation of toluene in a focused laser beam. A spatial resolution better that 5 µm and a 3 dimensional SMI mode will be demonstrated and compared with simulations.
[1] A. T. Eppink, D. H. Parker, Rev. Sci. Instrum. 68, 3477 (1997)
[2] M. Brouard, A.J. Johnsen, A. Nomerotski, C.S. Slater, C. Vallance, and W.H. Yuen, JINST 6, C01044, (2011)
[3] M. Schultze, B. Bergues, H. Schröder, F. Krausz and K. L. Kompa, New J. Phys. 13, (2011)