Time-resolved ion imaging at free-electron lasers using TimepixCam

Journal of Synchrotron Radiation
Merlin Fisher-LevineDaniel Rolles

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.

References

Oct 26, 2010·Journal of the American Society for Mass Spectrometry·Julia H JungmannRon M A Heeren
Mar 13, 2012·Annual Review of Physical Chemistry·Joachim UllrichRobert Moshammer
Dec 15, 2012·Rapid Communications in Mass Spectrometry : RCM·Julia H Jungmann, Ron M A Heeren
Jul 19, 2014·Science·Benjamin ErkArtem Rudenko
Jul 10, 2017·The Journal of Chemical Physics·Jingming LongMarc J J Vrakking
Dec 3, 2017·The Review of Scientific Instruments·Arthur ZhaoThomas Weinacht

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Citations

May 10, 2019·The Journal of Chemical Physics·Spencer L HortonThomas Weinacht
Feb 6, 2020·Biomedical Optics Express·Rajannya SenDmitri Papkovsky
Sep 4, 2021·Journal of Synchrotron Radiation·Ángela Saá HernándezMarcos Seoane

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