Speaker
Description
Timepix4 is the latest generation application-specific integrated circuit (ASIC) of the Timepix family, developed by the Medipix4 Collaboration, and mainly targeted for single particle detection in hybrid pixel detectors.
It is built in $65\;nm$ CMOS technology, and it allows to achieve excellent resolutions, thanks to a pixel pitch of $55\;\mu m$, a Time-to-Digital Converter bin size of $195\;ps$, and an energy resolution of $\sim1\;keV$ provided by the Time-over-Threshold (ToT) measurement. With around 230 thousand channels, equipped with both analog and digital front-end electronics, the Timepix4 ASIC stands out for its data-driven architecture, capable of transmitting output data with an high bandwidth, reaching up to $160$ Gb/s. The management of this high-speed data is ensured by FPGA-based external electronics, which also serve as a flexible control board to configure the ASIC.
In order to systematically characterize a Timepix4 assembly bump-bonded to a $300\;\mu m$ silicon pixellated sensor, the tunable monochromatic source of the SYRMEP beamline of the Elettra synchrotron facility has been used.
In particular, a per-pixel calibration of the ToT against the energy released in the Si detector has been performed, to optimize the detector energy resolution. A preliminary analysis aims to study the energy resolution dependence on the X-rays energy, and to estimate the detector efficiency and dead time. Eventually, measurements have been performed in order to assess the spatial resolution in terms of Point Spread Function.
| Collaboration | Medipix4 |
|---|---|
| Role of Submitter | I am the presenter |
