Ion irradiation and radiation effect characterization at the JANNUS-Saclay triple beam facility
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vain Vaubaillon and Stéphanie Pellegrino CEA, DEN, Service de Recherches de Métallurgie Physique, Laboratoire JANNUS, F-91191 Gif-sur-Yvette, France; and CEA, INSTN, UEPTN, Laboratoire JANNUS, F-91191 Gif-sur-Yvette, France
Diana Bachiller-Perea Centro de Micro-Análisis de Materiales, Universidad Autónoma de Madrid, C/ Faraday 3, Campus de Cantoblanco, E-28049 Madrid, España (Received 3 October 2014; accepted 17 December 2014)
JANNUS (Joint Accelerators for Nanosciences and Nuclear Simulation), the unique triple beam facility in Europe, offers the possibility to produce three ion beams simultaneously for nuclear recoil damage and implantation of a large array of ions for well-controlled modeling-oriented experiments. The first triple beam irradiation was performed in March 2010. Along with irradiation developments, continuous efforts have been made to implement ex situ and in situ characterization tools. In this study, we set out the present status of the JANNUS facility of the Saclay site. We focus on the instrumentation used for conducting multi-ion beam irradiations and implantations as well as for characterizing bombarded samples. On-line control of irradiation parameters, in situ modification monitoring using Raman spectroscopy or ion beam induced luminescence, and ex situ characterization by ion beam surface analysis [Rutherford backscattering spectrometry (RBS), nuclear reaction analysis (NRA), and elastic recoil detection analysis (ERDA)] of implanted samples are detailed. Some examples of single, dual, and triple beam irradiation configurations are presented. Access to the facility is provided by the French network EMIR for national and international users (http://emir.in2p3.fr/). I. INTRODUCTION
The ability of ion beams to simulate neutron-induced damage effects and their main consequences on both microstructure and mechanical property changes in nuclear materials have been proposed in several studies. An article reviewing the use of ion beams to understand the effects of neutron irradiation was recently published.1 The main advantages of this simulation process are linked to the versatility of the available experimental irradiation conditions (temperature, dose rate, fluence, and damaged thickness) and to the possibility to carry out in situ or ex situ physicochemical and structural characterization. Additional advantages are also expected: No (or very low) residual activation of the material, short irradiation times (hours versus months or years), and lower costs than reactor operation. Contributing Editor: Khalid Hattar a) Address all correspondence to this author. e-mail: [email protected] This author was an editor of this focus issue during the review and decision stage. For the JMR policy on review and publication of manuscripts authored by editors, please refer to http://www.mrs. org/jmr-editor-manuscripts/ DOI: 10.1557/jmr.2014.414 J. Mater. Res., 2015
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For that purpose, multiple ion beam facilities have been developed worldwide or are in the p
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