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The evaluation of radiation damage parameter for CVD diamond

Grilj, Veljko; Skukan, Natko; Jakšić, Milko; Pomorski, M.; Kada, W.; Kamiya, T.; Ohshima, T. (2016) The evaluation of radiation damage parameter for CVD diamond. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 372 . pp. 161-164. ISSN 0168-583X

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There are a few different phenomenological approaches that aim to track the dependence of signal height in irradiated solid state detectors on the fluence of damaging particles. However, none of them are capable to provide a unique radiation hardness parameter that would reflect solely the material capability to withstand high radiation environment. To extract such a parameter for chemical vapor deposited (CVD) diamond, two different diamond detectors were irradiated with proton beams in MeV energy range and subjected afterwards to ion beam induced charge (IBIC) analysis. The change in charge collection efficiency (CCE) due to defects produced was investigated in context of a theoretical model that was developed on the basis of the adjoint method for linearization of the continuity equations of electrons and holes. Detailed modeling of measured data resulted with the first known value of the kr product for diamond, where k represents the number of charge carriers’ traps created per one simulated primary lattice vacancy and r represents the charge carriers’ capture cross section. As discussed in the text, this product could be considered as a true radiation damage parameter.

Item Type: Article
Uncontrolled Keywords: radiation hardness; CVD diamond; detector irradiation
Subjects: NATURAL SCIENCES > Physics
Divisions: Division of Experimental Physics
Project titleProject leaderProject codeProject type
Promjene u kristaliničnim materijalima izazvane ionskim snopovima MeV-skih energija-MIOBICCStjepko FazinićIP-2013-11-8127HRZZ
Depositing User: Andreo Crnjac
Date Deposited: 11 Mar 2019 10:44
DOI: 10.1016/j.nimb.2015.12.046

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