Speaker
Description
The combination of gaseous detectors with high-granularity charge readout offers very specific possibilities, which otherwise could not be achieved. Examples are high-resolution tracking of low-momentum particle beams (i.e. requiring low-material budget), X-ray polarimetry and the detection of low-energetic (< 2 keV) X-rays, as well as rare-event searches that rely on event-selection based on geometrical parameters.
In this presentation, a new research line within the CERN EP R&D programme is shown, where the Timepix4 is embedded into Micro-Pattern Gaseous Detectors (MPGDs). The Timepix4 is advantageous because of its size (~ 7 cm² active area with 448 x 512 square pixels of 55 µm pitch) and its Through Silicon Vias (TSVs). The latter enables a full connection of the ASIC from the back side. Thus, it can be tiled on four sides, allowing it to cover even large areas without losing active area.
In terms of detector technologies, both triple-GEM and µRWELL are employed. The triple-GEM serves mainly as a technology demonstrator and helps to understand the signal induction and acquisition processes. A first detector prototype was already operated successfully, resulting in the first X-ray image taken with a TSV-Timepix4. The µRWELL is still in the exploration and production phase, with a µRWELL read out by a Timepix4 (without embedding technology) expected soon.
