20 ps time resolution with a fully-efficient monolithic silicon pixel detector without internal gain layer. (1st March 2023)

• Record Type: Journal Article
• Authors: Zambito, S.; Milanesio, M.; Moretti, T.; Paolozzi, L.; Munker, M.; Cardella, R.; Kugathasan, T.; Martinelli, F.; Picardi, A.; Elviretti, M.; Rücker, H.; Trusch, A.; Cadoux, F.; Cardarelli, R.; Débieux, S.; Favre, Y.; Fenoglio, C.A.; Ferrere, D.; Gonzalez-Sevilla, S.; Iodice, L.; Kotitsa, R.; Magliocca, C.; Nessi, M.; Pizarro-Medina, A.; Sabater Iglesias, J.; Saidi, J.; Vicente Barreto Pinto, M.; Iacobucci, G.
• Is Part Of: Journal of instrumentation. Volume 18:Number 3(2023)
• Publication Date: 2023-03-01
• Subjects: Particle tracking detectors (Solid-state detectors) -- Solid state detectors -- Timing detectors; Scientific apparatus and instruments -- Periodicals; 502.84
• DOI: 10.1088/1748-0221/18/03/P03047
• Languages: English
• ISSNs: 1748-0221

Abstract

Abstract: A second monolithic silicon pixel prototype was produced for the MONOLITH project. The ASIC contains a matrix of hexagonal pixels with 100 μm pitch, readout by a low-noise and very fast SiGe HBT frontend electronics. Wafers with 50 μm thick epilayer of 350 Ωcm resistivity were used to produce a fully depleted sensor. Laboratory and testbeam measurements of the analog channels present in the pixel matrix show that the sensor has a 130 V wide bias-voltage operation plateau at which the efficiency is 99.8%. Although this prototype does not include an internal gain layer, the design optimised for timing of the sensor and the front-end electronics provides a time resolutions of 20 ps.