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Determination of radiation hardness of silicon diodes

Vittone, E., Garcia Lopez, J., Jaksic, M., Jimenez Ramos, M.C., Lohstroh, A., Pastuovic, Z., Rath, S., Siegele, R., Skukan, N., Vizkelethy, G. and Simon, A. (2019) Determination of radiation hardness of silicon diodes Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 449. pp. 6-10.

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In this paper, we describe an experiment aimed to measure the physical observables, which can be used for the assessment of the radiation hardness of commercially available silicon photo diodes commonly used as nuclear detectors in particle accelerator laboratories. The experiment adopted the methodology developed during the International Atomic Energy Agency (IAEA) Coordinated Research Project (CRP No. F11016) “Utilization of Ion Accelerators for Studying and Modelling Ion Induced Radiation Defects in Semiconductors and Insulators”.

This methodology is based on the selective irradiation of micrometer-sized regions with different fluences of MeV ions using an ion microbeam and on the measurement of the charge collection efficiency (CCE) degradation by Ion Beam Induced Charge (IBIC) microscopy performed in full depletion condition, using different probing ions.

The IBIC results are analyzed through a theoretical approach based on the Shockley-Read-Hall model for the free carrier recombination in the presence of ion-induced deep traps. This interpretative model allows the evaluation of the material radiation hardness in terms of recombination parameters for both electrons and holes.

The device under study in this experiment was a commercial p-i-n photodiode, which was initially characterized by i) standard electronic characterization techniques to determine its doping and ii) the Angle-Resolved IBIC to evaluate its effective entrance window. Nine regions of (100 × 100) µm2 were irradiated with 11.25 MeV He ions up to a maximum fluence of 3·1012 ions/cm2. The CCE degradation was measured by the IBIC technique using 11.25 MeV He and 1.4 MeV He as probing ions.

The model presented here proved to be effective for fitting the experimental data. The fitting parameters correspond to the recombination coefficients, which are the key parameters for the characterization of the effects of radiation damage in semiconductors.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
Vittone, E.
Garcia Lopez, J.
Jaksic, M.
Jimenez Ramos, M.C.
Pastuovic, Z.
Rath, S.
Siegele, R.
Skukan, N.
Vizkelethy, G.
Simon, A.
Date : 15 June 2019
DOI : 10.1016/j.nimb.2019.04.032
Copyright Disclaimer : © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Uncontrolled Keywords : IBIC; Radiation damage; Radiation hardness; Ion microbeam; Silicon diode
Depositing User : Clive Harris
Date Deposited : 10 May 2019 13:30
Last Modified : 22 Oct 2019 11:50

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