Controlling the Motion of Complex Molecules and Particles (COMOTION)

Pipelines of lightª

Donut-shaped laser beams guide single nanoparticles
Laser Desorptionª

Laser desorption of biomolecules and supersonic expansion cooling to 1K
Single-particle imagingª

Single-particle diffractive imaging at Free-Electron Lasers

We develop innovative methods to obtain full control over large molecules and nanoparticles. These methods and the created controlled samples are exploited in fundamental physics and chemistry studies to unravel the underlying mechanisms of chemistry and biology by watching molecules at work.

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Position in scientific management

03 January 2025

Timepix3: single-pixel multi-hit energy-measurement behaviour

13 November 2024

The event-driven hybrid-pixel detector readout chip, Timepix3, has the ability to simultaneously measure the time of an event on the nanosecond timescale and the energy deposited in the sensor. However, the behaviour of the system when two events are recorded in quick succession of each other on the same pixel was not studied in detail previously. We present experimental measurements, circuit simulations, and an empirical model for the impact of a preceding event on this energy measurements, which can result in a loss as high as 70%. Accounting for this effect enables more precise compensation, particularly for phenomena like timewalk. This results in significant improvements in time resolution — in the best case, multiple tens of nanoseconds — when two events happen in rapid succession.

Recent Publications

Controlling the Motion of Complex Molecules and Particles (COMOTION)

Pipelines of lightª

Laser Desorptionª

Single-particle imagingª

Highlights