Erlangen 2018 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 24: Experimental Techniques

MO 24.7: Vortrag

Freitag, 9. März 2018, 12:00–12:15, PA 2.150

Molecular frame 3D momentum imaged using TimePix3 — •Ruth Livingstone1, Milija Sarajlic2, David Pennicard2, Martin van Beuzekom3, Bas van der Heijden3, Jan Visser3, Heinz Graafsma2, Andrei Nomerotski4, Sebastian Trippel1,2, and Jochen Küpper1,2,51The Hamburg Center for Ultrafast Imaging, Luruper Chaussee 149, Universität Hamburg, DE — 2Hamburg Center for Free-Electron Laser Science, DESY, Notkestrasse 85, DE — 3National Institute of Subatomic Physics NIKHEF, Science Park 105, Amsterdam, NL — 4Brookhaven National Laboratory, Upton, NY, USA — 5Department of Physics & Department of Chemistry, Universität Hamburg, DE

Timepix3 is a powerful new detector for imaging photons, ions, or electrons with 1.8 ns time resolution [1]. Here, we demonstrate the capabilities of the detector by measuring carbonyl sulphide (OCS) fragment momentum vectors after strong field ionization. The full 3D momenta of the OCS++ → OC+ + S+ fragmentation channel were measured in coincidence mode, allowing for the molecular frame distribution to be reconstructed. The Timepix detector was integrated into the current spectrometer setup without modification to the vacuum chamber. The resulting temporal resolution was under 3 ns, as a result of the phosphor used. The advantages of this detector over the current time resolved detection methods will be discussed, along with ways to achieve the optimum temporal resolution.

[1] A. Zhao et. al., Rev. Sci. Instrum. 88, 113104 (2017)

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