Showing 21 - 30 of 1684 Journals Results
2021
UKAEA-CCFE-PR(21)49
Phillip Gopon James O. Douglas Frederick Meisenkothen Jaspreet Singh Andrew J. London Michael P. Moody
Using a combination of simulated data and pyrite isotopic reference materials, we have refined a methodology to obtain quantitative δ34S measurements from atom probe tomography (APT) datasets. This study builds on previous attempts to characterize relative 34S/32S ratios in gold containing pyrite using APT. We have also improved our understand…
Preprint2021
UKAEA-CCFE-PR(21)50
A. J. Cackett H. T. Vo J. J. H. Lim A.J. Bushby P. Hosemann C.D. Hardie
The results of small-scale mechanical tests are convoluted by the so-called size effect, whereby materials appear stronger when the scale of the test is reduced to the order of microns or less. The dimensional range over which this occurs has been shown to be linked to a change in sample microstructure, such as the addition of defects induced by ir…
Preprint2021
UKAEA-CCFE-PR(21)51
Elena V. Rosa Adame Andrius Aleksa Mark R. Gilbert Martin Cuddy Tristan Calvet Zsolt Vizvary Nicolas Mantel Francesco Maviglia Jeong Ha You
A development plan for validation of functional principles is defined to support the challenges of mock-up manufacturing and testing. It is aimed to develop the process and infrastructure for qualifying fusion components for the limiters in the European DEMO. The limiters are components that define the plasma boundary by direct contact during norma…
Preprint2021
UKAEA-CCFE-PR(21)52
A Quadling Director of Materials UK Atomic Energy AuthorityWE Lee Ser Cymru Professor of Materials in Extreme Environments Nuclear Futures Institute Bangor University.J Astbury Reactor Technology Manager & Head of Neutronics Tokamak Energy
Fusion has entered the engineering era. Moving from plasma science to experiments demonstrating the benefits of modified torus shapes and advanced divertor geometries, the ‘field’ has become an ‘industry’. Investors focus now on whether superconducting magnet joints are feasible in large tokamak designs and how to deliver net energy to grid…
Preprint2020
UKAEA-CCFE-PR(21)48
J. Shimwell J. Billingsley R Delaporte-Mathurin D. Morbey M. Bluteau P.Shriwise
During the design process of fusion reactors it is desirable to rapidly prototype different design concepts and assess their suitability against a range of high level requirements. This helps to narrow the design window and scope out potential designs which can undergo further more detailed analysis. The Paramak is an open-source tool that aims …
Preprint2021
UKAEA-CCFE-PR(21)47
A Thorman E Litherland-Smith S Menmuir N Hawkes M O'Mullane E Delabie B Lomanowski J M Fontdecaba S Scully
Visible emission from a broad range of tungsten charge states has complicated plasma ion temperature and toroidal rotation measurements on the JET tokamak since the installation of the ITER-like wall. A plethora of charge exchange emission lines from ions up to W 56+ and 21 suspected magnetic dipole emission lines have so far been observed. In part…
Preprint2021
UKAEA-CCFE-PR(21)46
V. K. Zotta L. Garzotti F. J. Casson D. Frigione F. Koechl E. Lerche P. Lomas F. Rimini M. Sertoli D. Van Eester R. Gatto C. Mazzotta G. Pucella
The fusion performance of ELMy H-mode DT plasmas with q95 = 3 and \\beta_N = 1.8 (also referred to as medium-\\beta_N baseline scenario in the rest of this paper) are predicted with the JINTRAC suite of codes and the QuaLiKiZ transport model. The predictions are based on the analysis of DT plasmas from the first DT campaign on JET in 1997 (DTE1…
Preprint2021
UKAEA-CCFE-PR(21)45
D. Galassi C. Theiler T. Body F. Manke P. Micheletti J. Omotani M. Wiesenberger M. Baquero-Ruiz I. Furno M. Giacomin E. Laribi F. Militello P. Ricci A. Stegmeir P. Tamain H. Bufferand G. Ciraolo H. De Oliveira A. F. Fasoli V. Naulin S. L. Newton N. Offeddu D. Sales Oliveira E. Serre N. Vianello
Transport processes around the magnetic X-point of tokamaks, such as turbulence and mean-field drifts, are scarcely understood and difficult to investigate in experiments. In this paper, we explore the dynamics in a newly developed X-point scenario on the basic toroidal plasma device TORPEX and use it to validate plasma edge turbulence codes. In-si…
Preprint2021
UKAEA-CCFE-PR(21)44
A J T HolmesR McAdams
A model is presented for space charge neutralisation of positive ion beams. The model is used for the particular case of the beams used for magnetic based fusion applications. The beams consist, after a gas neutraliser, of ions and atoms at different energies. Account is taken of the co…
Preprint2021
UKAEA-CCFE-PR(21)43