Author:
Fisher-Levine Merlin,Boll Rebecca,Ziaee Farzaneh,Bomme Cédric,Erk Benjamin,Rompotis Dimitrios,Marchenko Tatiana,Nomerotski Andrei,Rolles Daniel
Abstract
The application of a novel fast optical-imaging camera, TimepixCam, to molecular photoionization experiments using the velocity-map imaging technique at a free-electron laser is described. TimepixCam is a 256 × 256 pixel CMOS camera that is able to detect and time-stamp ion hits with 20 ns timing resolution, thus making it possible to record ion momentum images for all fragment ions simultaneously and avoiding the need to gate the detector on a single fragment. This allows the recording of significantly more data within a given amount of beam time and is particularly useful for pump–probe experiments, where drifts, for example, in the timing and pulse energy of the free-electron laser, severely limit the comparability of pump–probe scans for different fragments taken consecutively. In principle, this also allows ion–ion covariance or coincidence techniques to be applied to determine angular correlations between fragments.
Funder
Chemical Sciences, Geosciences, and Biosciences Division, Office of Basic Energy Sciences, Office of Science, US Department of Energy
Helmholtz-Gemeinschaft through the Helmholtz Young Investigator Program
Brookhaven National Laboratory LDRD
Publisher
International Union of Crystallography (IUCr)
Subject
Instrumentation,Nuclear and High Energy Physics,Radiation
Cited by
15 articles.
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