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research article

Timing performance of radiation hard MALTA monolithic pixel sensors

Gustavino, G.
•
Allport, P.
•
Asensi, I.
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March 1, 2023
Journal Of Instrumentation

The MALTA family of Depleted Monolithic Active Pixel Sensor (DMAPS) produced in Tower 180 nm CMOS technology targets radiation hard applications for the HL-LHC and beyond. Several process modifications and front-end improvements have resulted in radiation hardness up to 2 x 10(15) 1 MeV n(eq)/cm(2) and time resolution below 2 ns, with uniform charge collection efficiency across the pixel of size 36.4 x 36.4 mu m(2) with a 3 mu m(2) electrode size. The MALTA2 demonstrator produced in 2021 on high-resistivity epitaxial silicon and on Czochralski substrates implements a new cascoded front-end that reduces the RTS noise and has a higher gain. This contribution shows results from MALTA2 on timing resolution at the nanosecond level from the CERN SPS test-beam campaign of 2021.

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