SMuK 2023 – scientific programme
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T: Fachverband Teilchenphysik
T 124: Si-Strip/CMS, Pixel/DMAPS
T 124.6: Talk
Thursday, March 23, 2023, 17:05–17:20, WIL/C307
Test-beam campaign and characterization of irradiated depleted monolithic active pixel sensors (DMAPS) designed in 150nm CMOS technology — •Lars Schall1, Christian Bespin1, Ivan Caicedo1, Jochen Dingfelder1, Tomasz Hemperek2, Toko Hirono1, Fabian Hügging1, Hans Krüger1, Piotr Rymaszewski2, Tianyang Wang3, and Norbert Wermes1 — 1University of Bonn, Germany — 2Dectris, Switzerland — 3Zhangjiang National Lab, China
Monolithic active pixel sensors with depleted substrates are a promising option for pixel tracking detectors in high-radiation environments. The use of a highly resistive silicon substrate and short drift paths enhance the radiation tolerance, while a careful guard ring design facilitates high biasing voltages to deplete the sensor.
LF-Monopix2 is the latest prototype of a DMAPS development in 150 nm CMOS technology. It features a fully functional column-drain readout architecture in a 2x1 cm2 matrix. A reduced pixel pitch of 50x150 µ m2 compared to its predecessor results in a smaller detector capacitance and an improved spatial resolution. Each pixel’s digital electronics are integrated within the large collection electrode.
LF-Monopix2 chips thinned down to 100 µ m have been tested and found to work successfully after being irradiated to 1e15 neq/cm2. In this talk, results from recent characterization measurements and test-beam campaigns are shown. Focus is put on measurements with irradiated sensors and the comparison to unirradiated sensors.