Simulation of beam induced lattice defects of diamond detectors using FLUKA

TL;DR

This paper compares two models, NIEL and DPA, for predicting radiation damage in diamond and silicon detectors using FLUKA simulations across various particles and energies.

Contribution

It implements and compares NIEL and DPA models within FLUKA for predicting radiation damage in diamond detectors.

Findings

DPA provides a better scaling for radiation damage than NIEL.

Simulation results show differences in damage predictions between diamond and silicon.

The models are validated across protons, neutrons, and pions over a wide energy range.

Abstract

Diamond is more and more used as detector material for particle detection. One argument for diamond is its higher radiation hardness compared to silicon. Since various particles have different potential for radiation damage at different energies a scaling rule is necessary for the prediction of radiation damage. For silicon detectors the non-ionising energy loss (NIEL) is used for scaling the effects of different particles. A different way of predicting the radiation damage is based on the Norget-Robinson-Torrens theorem to predict the number of displacements per atom (DPA). This provides a better scaling rule since recombination effects are taken into account. This model is implemented in the FLUKA Monte Carlo simulations package for protons, neutrons and pions. We compare simulation results of NIEL and DPA for diamond and silicon material exposed to protons, neutrons and pions for a wide range of energies.