PM2024 - 16th Pisa Meeting on Advanced Detectors

Timepix4 assembly characterization using a monochromatic X-rays source at the ELETTRA facility

28 May 2024, 08:31

3h 59m

Sala Elena

Poster T5 - Applications to Industrial and Societal Challenges Applications to Industrial and Societal Challenges - Poster session

Speaker

Riccardo Bolzonella (INFN - Ferrara)

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 $65nm$ 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 $195ps$, and an energy resolution of $\sim 1keV$ 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.

Presentation materials

picture-Bolzonella.jpg

poster-Bolzonella.pdf