Charge collection parameterization of MALTA2, a depleted monolithic active pixel sensor

Fasselt L., Behera P., Berlea D., Bortoletto D., Buttar C., Chembakan T., ...More

Journal of Instrumentation, vol.21, no.4, 2026 (SCI-Expanded, Scopus) identifier

  • Publication Type: Article / Article
  • Volume: 21 Issue: 4
  • Publication Date: 2026
  • Doi Number: 10.1088/1748-0221/21/04/c04001
  • Journal Name: Journal of Instrumentation
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, Index Islamicus, INSPEC
  • Keywords: Detector modelling and simulations II (electric fields, charge transport, multiplication and induction, pulse formation, electron emission, etc), Particle tracking detectors, Radiation-hard detectors
  • Ankara University Affiliated: Yes

Abstract

A fast simulation method is presented for a depleted monolithic active pixel sensor, which uses a data driven parameterization of the charge collection and propagation. This approach provides an efficient alternative to TCAD simulations, particularly for sensors whose proprietary process details — such as doping profiles or implant geometries — are unavailable. Data was obtained with a MALTA2 sensor fabricated in a 180 nm CMOS imaging technology on 30 µm epitaxial silicon using the MALTA beam telescope at CERN SPS. The model reproduces the measured in-pixel efficiency with high accuracy and enables a realistic yet computationally lightweight analog pixel simulation. This method will be further employed in optimizing the digital sensor design for applications in high-rate particle tracking and high-granularity calorimetry.