Speaker
Description
In recent years, development of pixel detectors has evolved from only improving the spatial resolution to also improving the temporal resolution.
The ultimate goal is to develop a 4 dimensional tracking (4D tracking) system capable of combining micrometer spatial resolution with a temporal resolution in the order of tens of picoseconds. Sensor types such as Low-Gain-Avalanche-Detectors (LGADs) provide a promising avenue for detectors with excellent time resolution due to their intrinsic gain. To achieve a good spatial resolution, segmentation into small pixels in the order of 50 micron is required. The introduction of trench isolation to the LGAD production process, producing the Trench-Isolated-LGADs (TI-LGADs), enables the technology to achieve the necessary segmentation for use in 4D tracking.
Small pixel TI-LGADs with a miniaturization of pixels down to 55 micron pitch have been assembled on the Timepix4 ASIC and were tested both using lasers and using the Timepix4 telescope as a reference at the CERN SPS beamline.
In this contribution we will present recent SPS test beam results of 2nd generation TI-LGAD on Timepix4 using the Timepix4 telescope as a reference. The presentation will evaluate both the temporal and spatial resolution of small pitch TI-LGAD, including their dependence on temperature and incident angle in order to evaluate the technology with regards to its 4D tracking capabilities.