Speaker
Description
A high rate beam telescope, comprised of eight Timepix4-based sensor planes, has been constructed, featuring both thin (100 μm) planar sensors for better temporal measurements and thick (300 μm) sensors for more precise spatial measurements.
The Timepix4 ASIC, compatible with various sensor technologies, consists of a matrix of 448×512 pixels with a 55 μm square pitch. Simultaneous measurement of Time of Arrival (ToA) and Time over Threshold (ToT) is performed for individual pixel hits. The ToA, digitised with a 195 ps time bin via per-pixel Time-to-Digital Converters (TDCs), enables precise timing measurements. The ToT is proportional to the collected charge, contributing to sub-pixel spatial resolution and correcting for timewalk, essential for good ToA resolution. The telescope is equipped with two fast microchannel plate detectors (MCPs) with quartz windows for Cherenkov light generation. MCP signals are processed to provide timestamp precision below 20 ps, crucial for characterising and calibrating temporal measurements of the telescope and fast-sensor prototypes.
The telescope achieved a pointing resolution of 2 μm. After several per-pixel time corrections, the combined time resolution of 90 ps per track is obtained using information from the timepix4 ASICs alone.
This presentation will show the most recent results from the Timepix4 telescope and DUT results from fast sensor technologies such as trench-isolated and inverted LGADs, as well as 3D sensors.
| Primary experiment | LHCb |
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