L. W. Packer P. Batistoni N. Bekris S. C. Bradnam H. Chohan M. Fabbri Z. Ghani M. R. Gilbert R. Kierepko E. Laszynska D. Leichtle I. Lengarf S. Loreti J. W. Mietelski C. R. Nobs M. Pillon M. I. Savva I. E.Stamatelatos T. Vasilopoulou A. Wojcik-Gargula A. Zoharf JET Contributors
The characteristically intense neutron source generated in deuterium-tritium (DT) fusion power presents notable challenges for materials comprising the structure of the device which are exposed to them. These include radiation damage effects leading to degradation of structural properties with impact on maintenance and replacement frequency, but…
PreprintJames H.P. Rice Jianzhao Geng Rodney A. Badcock Dominic A. Moseley Steven Wray Heng Zhang
The application of dc magnetic field to a 2G high temperature superconducting (HTS) tape can reduce the critical current Ic of the tape, without driving the material normal. This property can be used in the development of HTS switching elements through so-called Jc(B) switching. The design of a dc magnetic field switch is reported, in both singl…
PreprintR. Scannell H. Liu E. Mukhin E. Yatsuka A. Gorbunov L. Giudicotti G. Kurskiev J. Chen M. A. Van Zeeland D. Finkenthal R. Imazawa D. Brower A. Sirinelli T. Akiyama T. Carlstrom D. Johnson M. Lesher C. Watts M. Bassan
This paper provides an overview of the status of the laser diagnostics to be implemented on ITER. This includes descriptions of the Thomson scattering in the Core, Edge and Divertor regions, polarimetry and interferometry diagnostics used for measuring plasma density and also measurements of Helium density in the divertor using Laser Induced Flo…
PreprintB. Chapman D.R. Hatch A.R. Field L. Frassinetti J.C. Hillesheim L. Horvath C.F. Maggi J. F. Parisi C.M. Roach S.Saarelma J. Walker JET contributors
We present the results of GENE gyrokinetic calculations based on a series of JET-ILW type I ELMy H-mode discharges operating with similar experimental inputsbut at different levels of power and gas fuelling. We show that turbulence due to slab electron-temperature-gradient modes (sETGs) produces a significant amount of heat flux in four JET-ILW …
PublishedJ.H.P. Rice J. Geng C.W. Bumby H.W. Weijers S. Wray H. Zhang F. Schoofs D. Moseley R.A. Badcock
High temperature superconducting magnets offer a novel pathway to magnetic confinement fusion energy generation. Reactor-scale fusion devices require tens of kA of current to generate large toroidal fields for magnetic confinement. Operating HTS magnets at kA-current levels is difficult due to unavoidable joint resistances that require active dr…
PreprintG. Szepesi L.C. Appel E. de la Luna L. Frassinetti P. Gaudio M. Gelfusa S. Gerasimov N.C. Hawkes M. Sertoli D. Terranova
Many of the essential data analysis procedures for a tokamak experiment rely on the knowledge of the magnetic field structure obtained from MHD force balance. On JET, the code that is responsible for computing the magnetic equilibrium is called EFIT++. Interpretation of JET data has been challenging due to inconsistencies between diagnostic meas…
PreprintE. Tholerus L. Garzotti Y. Baranov G. Corrigan F. Eriksson D. Farina L. Figini D.M. Harting F. Koechl A. Loarte E. Militello Asp H. Nordman V. Parail S.D. Pinches A.R. Polevoi R. Sartori P. Strand
An important part of the ITER Research Plan [1] is the Pre-Fusion Power Operation (PFPO) phase, which includes demonstration of H-mode plasma operation and the commissioning of ELM control systems. However, since hydrogen or helium are the main ion species in PFPO plasmas, the L–H power threshold PL–H is expected to be cons…
PreprintI. Ivanova-Stanik C.D. Challis A. Chomiczewska J. Hobirk A. Huber. A Kappatou E. Lerche G. Telesca R. Zagorski
The aim of this paper is to numerically study the influences of the impurities on the high power hybrid discharges in the JET ILW configuration in the DD and DT scenarios. Numerical simulations with the COREDIV code of hybrid discharges with 32MW auxiliary heating, 2.2MA plasma current and 2.8T toroidal magnetic field in the ITER-like wall (ILW)…
PreprintRobert J Ewart Felix I Parra Alessandro Geraldini
The Debye sheath is shown to vanish completely in magnetised plasmas for a sufficiently small angle between the magnetic field and the wall that depends on the current to the wall. When the Debye sheath vanishes, there is still a potential drop between the wall and the plasma across the magnetic presheath. The magnetic field angle corresponding …
PreprintJ. Korzeniowska J. Joannou
This paper describes a case study in seeking to encourage widespread adoption of Systems Engineering at the UK Atomic Energy Authority. Until recently, the quest for fusion energy has primarily been in the scientific research domain, but with a shift in focus to delivering commercially viable fusion power plants, there is a clear need for SE to …
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