1,721,249 research outputs found
Different regularization methods for an inverse magnetostatic problem
No full textThe resolution of inverse problems is a quite common task in the diagnostic processes based on electromagnetic field measurements, in particular when internal characteristics of the object under test must be estimated from external measurements. This class of problems are well known to be ill posed, and a number of different regularization techniques have been proposed to make the estimation process reliable. In this paper, with reference to an application in the framework of low frequency magnetic fields measurements, a comparison of some regularization techniques is presented, in order to highlight advantages and drawbacks of each in the proposed application
La comunicazione con il mercato
No full textUna gestione unitaria e coerernte della comunicazione è indispensabile per un'azienda di servizi pubblici che voglia orientarsi al cliente e rispondere con prontezza ai mutamenti del mercato. Una ricerca condotta per l'Atan di Napoli ha fornito preziose informazioni sul profilo degli utenti e sui loro livelli di soddisfazione, permettendo così azioni di miglioramento del servizio di trasporto pubblico urbano
Special Section on "DTT. Divertor Tokamak Test facility" - Guest Edited by R. Albanese, F. Crisanti, G. Granucci, R. Martone, R. Neu, A. Pizzuto, P. Sonato, in Fusion Engineering and Design, Vol. 122, p. 253-394, e1-e26 (November 2017)
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ACCURATE COMPUTATION OF ELECTROMAGNETIC-FIELDS IN THE PRESENCE OF CONDUCTING AND MAGNETIC MATERIALS
No full textThe DTT proposal. A tokamak facility to address exhaust challenges for DEMO: Introduction and executive summary
No full textAs indicated in the European Fusion Roadmap, the main objective of the Divertor Tokamak Test facility (DTT) is to explore alternative power exhaust solutions for DEMO so as to mitigate the risk that the conventional divertor based on detached conditions to be tested on the ITER device cannot be extrapolated to a fusion reactor. The issues to be investigated by DTT include:. •demonstrate a heat exhaust system capable of withstanding the large load of DEMO in case of inadequate radiated power fraction;•close the gaps in the exhaust area that cannot be addressed by present devices;•demonstrate that the possible (alternative or complementary) solutions (e.g., advanced divertor configurations or liquid metals) can be integrated in a DEMO device. In this paper, we describe a proposal for such a DTT, presented by ENEA in collaboration with a European team of scientists. The selection of the DTT parameters (a major radius of 2.15. m, an aspect ratio of about 3, an elongation of 1.6-1.8, a toroidal field of 6. T, and a flat top of about 100. s) has been made according to the following specifications:. •edge conditions as close as possible to DEMO in terms of dimensionless parameters;•flexibility to test a wide set of divertor concepts and techniques;•compatibility with bulk plasma performance.•an upper bound of 500M€ for the investment costs. This paper illustrates this DTT proposal showing how the basic machine parameters and concept have been selected so as to make a significant step toward the accomplishment of the power exhaust mission
ACCURATE COMPUTATION OF ELECTROMAGNETIC-FIELDS IN THE PRESENCE OF CONDUCTING AND MAGNETIC MATERIALS
No full textElectromechanical modelling of z-pinch plasma lenses with thermal and circuital coupling
No full textZ-pinches are well-known plasma devices recently proposed as magnetic lenses. This focusing application requires an accurate modelling of the magnetic field distribution in the plasma discharge dynamics. It is a typical electromagnetic coupled problem, involving mechanical, thermal and circuital aspects, that have all to be properly modelled and coupled together. In this paper a model of the device, including energy balance and circuit coupling, is outlined, and its application to plasma discharges is discusse
A fast, semi-analytical method for field computation in presence of magnetic and conductive materials
No full textThe computation of electric and magnetic fields in presence of magnetic conductive materials calls for methods able to cope with the complex interactions between these material characteristics, yet guaranteeing satisfactory computational promptness and accuracy in results. In the paper, a method based on the use of analytical expressions for magnetic fields produced, in the Magneto-Quasi-Static limit, by currents and equivalent magnetic sources is used to guarantee promptness and accuracy in field computation
Concentrated non-Brownian suspensions under oscillatory shear flow: Dependence on the applied strain and frequency
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