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FP7

Quantitative depth profiling of deuterium up to very large depths

Funded under: FP7-EURATOM

Abstract

Quantitative depth profiles of deuterium up to very large depths are achieved from the energy spectra of protons created by the D({3}He,p)alpha nuclear reaction at incident energies up to 6 MeV. The advantages of this method compared to the more often applied resonance method are discussed. For light target materials the achievable depth resolution is mainly limited by geometrical spread due to the finite size of the detector aperture, while for heavy materials the resolution is mainly limited by multiple small-angle scattering. A reasonable depth resolution throughout the whole analyzed depth can be obtained by using several different incident energies. Depth profiling up to 38 mu m is demonstrated for a-C:D layers deposited on the limiter of Tore Supra, and up to 7.5 mu m in tungsten coatings from the divertor of ASDEX Upgrade.

Additional information

Authors: MAYER M, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);SUGIYAMA K, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);VON TOUSSAINT U, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);GAUTHIER E, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: An article published in: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Volume 267, Issue 3, 2009, pp. 506-512
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://dx.doi.org/doi:10.1016/j.nimb.2008.11.033
Record Number: 200910360 / Last updated on: 2009-09-22
Category: PUBLICATION
Original language: en
Available languages: en