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" This document is intended for publication in the open literature. It is made available on the understanding that it may not be further circulated and extracts or references may not be published prior to publication of the original when applicable, or without the consent of the Publications Officer, The contents of this preprint and all other JET EFDA(More)
Guided acoustic waves (GAWs) are sensitive to delaminations between two materials. Certain modes can determine changes in adhesion for well-defined geometries. Considering the sensitivity of GAWs to detect delaminations, there is a paucity of attempts to quantify the adhesion between a hemispherical shell and a surrounding medium. The purpose of this study(More)
1 Helsinki University of Technology, Association Euratom – Tekes, Espoo, Finland 2 EURATOM/UKAEA Fusion Association, Culham Science Centre, Abingdon, UK; 3 EURATOM/IST Fusion Association, Centro de Fusão Nuclear, Lisboa Portugal 4 Associazione Euratom/ENEA/CNR sulla Fusione, Frascati, Rome, Italy 5 Alfven Laboratory, Association EURATOM-VR, Stockholm,(More)
The mechanical properties of single fibers are important when estimating the behavior of fibrous materials under stress. Appropriate tests are tedious and alter the fibers structurally and mechanically. To avoid this problem we developed a non-destructive ultrasonic method to determine the stiffness of 4-5 mm long, and 30 ± 10 ¿m thick, wood fibers during(More)
The Fusion Advanced Study Torus (FAST) has been proposed as a possible European ITER satellite. This paper presents advanced core transport modeling work in order to predict FAST operational scenarios by combining existing predictive models and most recent transport experimental results from various devices, in particular JET. A special attention has been(More)
T. Koskela1, A. Snicker1,7, S. Sipilä1, A. Salmi2, T. Johnson3, C. Marchetto4, M. Schneider5 M. Romanelli6, H. Weisen8, and JET contributors EUROfusion Consortium, JET, Culham Science Centre, Abingdon, OX14 3DB, UK 1 Aalto University School of Science, Espoo, Finland; 2 VTT Technical Research Centre, Finland; 3 Department of Fusion Plasma Physics, School of(More)
Experiments have been carried out in the JET tokamak in order to determine the critical ion temperature inverse gradient length (R/LTi =R|!Ti|/Ti) for the onset of Ion Temperature Gradient modes and the stiffness of Ti profiles with respect to deviations from the critical value. The existence of a threshold in R/LTi has been assessed and its value found in(More)
We continue our quest to determine localized micro- elasticity by combining a standing ultrasonic wave pattern and SAXS X-ray diffraction (CuK<sub>alpha</sub> 1.54 Aring) to map the local elastic modulus. This was done in 20times20times1.5 mm<sup>3</sup> dry Scots pine (Pinus Sylvestris L) soft wood and high-density polyethene (HDPE), acting as homogenized(More)