Raum: Small Max Born Hall
Optimization and application of the TPX3CAM for velocity map imaging at the SQS instrument
Dr. Björn Senfftleben | European XFEL, Hamburg-Schenefeldspricht über
The Timepix3 chip overcomes two challenges that pixelated scientific detectors face: It supports data acquisition at MHz repetition rates facilitated by single-pixel time-stamping with few nanosecond precision. Moreover, it can be operated in an event-driven mode, producing data only for pixels that exhibit relevant signal levels.
At the small quantum system (SQS) instrument at the European X-ray free electron laser facility (EuXFEL), we use ASI's TPX3CAM - an optical camera implementing the Timepix3 chip - for ion and electron velocity map imaging. In this setup, we benefit from the camera's high temporal resolution to record ion momenta in all three dimensions and/or its support for several hundred KHz to MHz repetition rates. Therefore, the optical camera acquires the optical light produced from ion/electron hits by an MCP phosphor stack.
This talk delves into optimizing the detector setup, where compromises between different aspects of signal quality, such as time resolution and spatial resolution, must be made. Furthermore, the camera's limitations due to a combination of readout bandwidth, repetition rate, and signal distribution will be discussed.