Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 90: Silicon trackers 4

T 90.7: Talk

Thursday, March 7, 2024, 17:30–17:45, Geb. 30.22: kl. HS B

Exploring Thermal Neutron Detection Capabilities with HV-MAPS — •Damini Suresh Babu for the HD-HVMAPS collaboration — Physikalisches Institut Universität Heidelberg

¹⁰B coated silicon sensors allow to construct incredibly compact thermal neutron detectors, as per the following neutron capture reaction, ¹⁰B + n → ⁴He + ⁷Li. For the first time the usage of High-Voltage Monolithic Active Pixel Sensors (HV-MAPS) is studied for this purpose. HV-MAPS offer the combination of readout and detection on a common silicon die and are produced in a commercially available 180 nm HV-CMOS process. Preliminary research is underway with the MuPix11 chip with an active size of 20 × 20 mm.

Feasibility tests include a study of the sensor response to large energy depositions with the help of α particles. The α and γ particles are also discriminated based on the observable cluster size and measured deposited charge. In this talk, the first results obtained with an ²⁴¹Am source are presented.

Keywords: HV-MAPS; Pixel Sensor; Alpha Particles; Thermal Neutron Detection; HV-CMOS