21–24 Jun 2022
CERN
Europe/Zurich timezone

Study of depth-dependent charge collection profiles in irradiated pad diodes

22 Jun 2022, 14:30
20m
6/2-024 - BE Auditorium Meyrin (CERN)

6/2-024 - BE Auditorium Meyrin

CERN

114
Show room on map

Speaker

Mohammadtaghi Hajheidari (Hamburg University (DE))

Description

In this work, charge collection profiles of non-irradiated and irradiated $150 \; \mu \text{m}$ $p$-type pad diodes were measured using a $5.2 \; \text{GeV}$ electron beam traversing the diode parallel to the readout electrode. Four diodes were irradiated to $1 \; \text{MeV}$ neutron equivalent fluences of 2, 4, 8, and $12 \times 10^{16} \; \text{cm}^{-2}$ with $23 \; \text{MeV}$ protons. By unfolding the measured charge collection profiles, the Charge Collection Efficiency profiles are extracted as a function of depth. The results of the measurements are compared to the simulation using three radiation damage models from literature which were tuned to different irradiation types and fluences.

Author

Mohammadtaghi Hajheidari (Hamburg University (DE))

Presentation materials