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arXiv · 2111.14407

Single-shot MHz velocity-map-imaging using two Timepix3 cameras

Hubertus Bromberger·Christopher Passow·David Pennicard·Rebecca Boll·Jonathan Correa·Lanhai He·Melby Johny·Christina Papadopoulou·Atia Tul-Noor·Joss Wiese·Sebastian Trippel·Benjamin Erk·Jochen Küpper
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Abstract

We demonstrate the application of event-driven Timepix3-based detectors in combination with a double-sided velocity-map-imaging spectrometer to record the full 3D momentum of charged particles at the free-electron-laser facility FLASH. We measured the XUV induced fragmentation of $\text{N}_2$ using 250 kHz FLASH bursts with sub-pixel spatial resolution and up to 1.7~ns temporal resolution for photoelectrons. To further demonstrate the capabilities of this camera at even higher repetition rates we measured single-shot images of He($1s$) photoelectrons for bursts with a repetition rate of 1 MHz. Overall, with the Timepix3 camera we overcome limitations of standard-camera technology for advanced-imaging experiments with requirements on high event-rates and high spatio-temporal resolution.

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Hubertus Bromberger, Christopher Passow, David Pennicard, Rebecca Boll, Jonathan Correa, Lanhai He, Melby Johny, Christina Papadopoulou, Atia Tul-Noor, Joss Wiese, Sebastian Trippel, Benjamin Erk, Jochen Küpper. 2021-11-29. Single-shot MHz velocity-map-imaging using two Timepix3 cameras. https://doi.org/10.1088/1361-6455%2Fac6b6b

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