W. Zwingmann M. Airaj L. Appel V. Drozdov L.-G. Eriksson B. Guillerminef G.T.A. Huysmans F. Imbeaux P. Mccarthy Ph. Moreau M. Romanelli P. Strand The Imp-1/Isip Team
The Integrated tokamak modelling taskforce was set up to provide the European scientific community with simulation tools for preparing and analysing discharges of fusion experiments. We will report on recent progress made on the taskforce project on equilibrium and linear stability. A generic data structure has been devised to describe the geometry…
PublishedC. H. Skinner A. A. Haasz V. Kh. Alimov N. Bekris R. A. Causey R. E. H. Clark J. P. Coad J. W. Davis R. P. Doerner M. Mayer A. Pisarev J. Roth T. Tanabe
Management of tritium inventory remains one of the grand challenges in the development of fusion energy, and the choice of plasma-facing materials is a key factor for in-vessel tritium retention. The Atomic and Molecular Data Unit of the International Atomic Energy Agency organized a Coordinated Research Project (CRP) on the overall topic of tritiu…
PublishedS. Khakshouri D. Alfè D. M. Duffy
Irradiation of a metal by lasers or swift heavy ions causes the electrons to become excited. In the vicinity of the excitation, an electronic temperature is established within a thermalization time of 10–100 fs, as a result of electron-electron collisions. For short times, corresponding to less than 1 ps after excitation, the resulting electronic…
PublishedM. Krychowiak Ph. Mertens B. Schweer S. Brezinsek R. Konig O. Schmitz M. Brix T. Klinger U. Samm
Local values of the electron density and temperature in the edge of a fusion plasma can be derived with high space and time resolution by the use of line radiation of atomic helium beams. The accuracy of this method is mainly limited by the uncertainties in the coUisional-radiative model which is needed in order to obtain both plasma parameters fro…
PublishedF. Villone Y. Q. Liu R. Paccagnella T. Bolzonella G. Rubinacci
In this Letter, the linear stability of the resistive wall modes (RWMs) in toroidal geometry for a reversed field pinch (RFP) plasma is studied. Three computational models are used: the cylindrical code ETAW , the toroidal MHD code MARS-F , and the CARMA code, able to take fully into account the effects of a threedimensional conducting structure wh…
PublishedR. Prokopowicz M. Scholz A. Szydlowski S. Popovichev
The paper reports on experiments carried out at JET to test the possibility of using some activating materials (e.g. 89Y, 167Er, 204Pb, 180Hf, 111Cd, etc.) to perform multi-foil neutron activation measurements. It is shown that apart from indium other materials can be successfully used in these measurements delivering more exact information about f…
PublishedColin Windsor Geoff Cottrell Richard Kemp
A prediction has been made of the Charpy ductile-brittle transition temperature at high irradiation levels from a dataset of 459 low-activation ferritic/martensitic steels. It follows a similar study of the yield stress of some 1811 similar alloys (Windsor et al , Modelling Simul. Mater. Sci. Eng. 16 (2008) 025005) Neural networks have previously b…
PublishedS. P. Fitzgerald D. Nguyen-Manh
We present the first derivation of the analytic expression for the Peierls-Nabarro potential for crowdion migration using the double sine-Gordon model. The analysis is guided by the group-specific trend in the shapes of the periodic lattice potentials calculated for the body-centered-cubic transition metals in groups 5B and 6B of the periodic table…
PublishedOliver Ford J. Svensson A. Boboc D. C. Mcdonald JET-EFDA Contributors
An analytical Bayesian inversion of the JET interferometry line integrated densities into density profiles and associated uncertainty information, is demonstrated. These are used, with a detailed model of plasma polarimetry, to predict the rotation and ellipticity for the JET polarimeter. This includes the lateral channels, for over 45,000 time poi…
Published