2024/01/02 by Matteo Milanesio, L. Paolozzi, Milanesio, M. +48
Engineering · Materials Science · #Electron and X-Ray Spectroscopy Techniques #FOS: Physical sciences #Instrumentation and Detectors (physics.ins-det) #Integrated Circuits and Semiconductor Failure Analysis #Semiconductor materials and devices
paper · pdf · doi:10.48550/arxiv.2401.01229
openalex publication_date 2024/01/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The time resolution of the second monolithic silicon pixel prototype produced for the MONOLITH H2020 ERC Advanced project was studied using a femtosecond laser. The ASIC contains a matrix of hexagonal pixels with 100 μm pitch, readout by low-noise and very fast SiGe HBT frontend electronics. Silicon wafers with 50 μm thick epilayer with a resistivity of 350 Ωcm were used to produce a fully depleted sensor. At the highest frontend power density tested of 2.7 W/cm2, the time resolution with the femtosecond laser pulses was found to be 45 ps for signals generated by 1200 electrons, and 3 ps in the case of 11k electrons, which corresponds approximately to 0.4 and 3.5 times the most probable value of the charge generated by a minimum-ionizing particle. The results were compared with testbeam data taken with the same prototype to evaluate the time jitter produced by the fluctuations of the charge collection.