M. Tardocchi M. Nocente I. Proverbio V. G. Kiptily P. Blanchard S. Conroy M. Fontanesi G. Grosso K. Kneupner E. Lerche A. Murari E. Perelli Cippo A. Pietropaolo B. Syme D. Van Eester G. Gorini
Intensities and detailed spectral shapes of γ-ray emission peaks were successfully reproduced using a physics model combining the kinetics of the reacting ions with a detailed description of the nuclear reaction differential cross sections for populating the L1-L8 14 N excitation levels yielding the observed γ-ray emission. The results provide a …
PublishedR. O. Dendy
The overall phenomenology of plasmas emerges from multiple couplings between processes on many different lengthscales and timescales, creating innumerable feedback loops. For example, overall energy confinement – the central emergent property for fusion – is governed by a selfconsistent loop involving: temperature, density, and current profiles…
PublishedM. Vrancken F. Durodié P. Dumortier D. Lockley F. Louche et al.
The ITER ICRF antenna’s coupled power to plasma is determined not only by the plasma scrape-off layer profiles and shaping of the front strap array, but also by assuring optimal excitation of the array by the overall layout of the feed network and the detailed shaping of the RF components therein. This paper describes the optimization of the feed…
PublishedE. G. Highcock M. Barnes F. I. Parra A. A. Schekochihin C. M. Roach et al.
First-principles numerical simulations are used to describe a transport bifurcation in a differentially rotating tokamak plasma. Such a bifurcation is more probable in a region of zero magnetic shear than one of finite magnetic shear, because in the former case the component of the sheared toroidal flow that is perpendicular to the magnetic field h…
PublishedC J Ham C G Gimblett S E Penington
It is well known that stabilization of the resistive wall mode (RWM) may allow fusion power to be significantly increased for a given magnetic field in advanced tokamak operation. The principle of stabilization of the RWM by rotation has been established both experimentally and theoretically. Recent experimental results have indicated stabilization…
PublishedN. P. Barradas J. Likonen E. Alves L. C. Alves P. Coad et al.
IBA techniques such as RBS, ERDA, NRA, or PIXE are highly complementary, and are often combined to maximize the extracted information. In particular, they have different sensitivities to various elements and probe different depth scales. The same is true for secondary ion mass spectrometry (SIMS), that can have much better detection limits for many…
PublishedX. Ledoux M. Aïche M. Avrigeanu V. Avrigeanu L. Audouin et al.
The “Neutrons for Science” (NFS) facility will be a component of SPIRAL-2, the future accelerator dedicated to the production of very intense radioactive ion beams, under construction at GANIL in Caen (France). NFS will be composed of a pulsed neutron beam for in-flight measurements and irradiation stations for cross-section measurements and ma…
PublishedAlessandro Zocco Alexander A. Schekochihin
A minimal model for magnetic reconnection and, generally, low-frequency dynamics in low-beta plasmas is proposed. The model combines analytical and computational simplicity with physical realizability: it is a rigorous limit of gyrokinetics for plasma beta of order the electron-ion mass ratio. The model contains collisions and can be used both in t…
Published