S. Grünhagen Romanelli S. Brezinsek B. Butler J.P. Coad A. Drenik C. Giroud S. Jachmich T. Keenan U. Kruezi M. Mozetic M. Oberkofler A. Parracho M. Romanelli R. Smith JET EFDA Contributors
Analytical results of a complete JET cryopump regeneration, including the nitrogen panel, follow- ing the first ITER-Like Wall campaign are presented along with the in-situ analyses of residual gas. H/D mixtures and impurities such as nitrogen and neon were injected during plasma operation in the vessel to study radiation cooling in the scrape-off-…
PublishedJ.P. Coad E. Alves N.P. Barradas A. Baron-Wiechec K. Heinola J. Likonen M. Mayer G.F. Matthews P. Petersson A. Widdowson JET-EFDA Contributors
This paper reports on the first post-mortem analyses of tiles removed from JET after the first campaigns with the ITER-like Wall (ILW) during 2011-2 [1]. Tiles from the divertor have been analysed by the Ion Beam Analysis (IBA) techniques Rutherford Backscattering Spectroscopy (RBS) and Nuclear Reaction Analysis (NRA) and by Secondary Ion Mass Spec…
PublishedG. Arnoux I. Balboa M. Clever S. Devaux P. De Vries T. Eich M. Firdaouss S. Jachmich M. Lehnen P.J. Lomas G.F. Matthews Ph. Mertens I. Nunes V. Riccardo C. Ruset B. Sieglin D.F. Valcarcel J. Wilson K.-D. Zastrow JET-EFDA Contributors
The ITER-like wall (ILW) at JET is a unique opportunity to study the combination of material (beryllium and tungsten) that will be used for the plasma facing components (PFC) in ITER. Both the limiters (Be) and divertor (CFC W coated and bulk W) have been designed to maximise their power handling capability. During the last experimental campaign (O…
PublishedAnthony J. Webster JET EFDA Contributors
The generic question is considered: How can we determine the probability of an otherwise quasirandom event, having been triggered by an external influence? A specific problem is the quantification of the success of techniques to trigger, and hence control, plasma instabilities in magnetically confined fusion (MCF) experiments. The successful develo…
PublishedS.N. Gerasimov T.C. Hender J. Morris V. Riccardo L.E. Zakharov JET EFDA Contributors
A key feature of disruptions during Vertical Displacement Events (VDEs), discovered in JET in 1996, is the toroidal variation in the measured plasma current Ip, i.e. the plasma current asymmetries, lasting for almost the entire current quench. The unique magnetic diagnostics at JET (full set of poloidal coils and saddle loops recorded either from t…
PublishedG. Nemtsev V. Amosov N. Marchenko S. Meshchaninov R. Rodionov S. Popovichev JET EFDA Contributors
In 2011-2012, an experimental campaign with a significant yield of fusion neutrons was carried out on the JET tokamak. During this campaign the facility was equipped with two diamond detectors based on natural and artificial CVD diamond. These detectors were designed and manufactured in State Research Center of Russian Federation TRINITI. The detec…
PublishedH. Weisen A. C. C. Sips C. D. Challis L.-G. Eriksson S. E. Sharapov P. Batistoni L. D. Horton K.-D. Zastrow EFDA-JET Contributors
After the first high power D-T experiment in JET in 1997 (DTE1), when JET was equipped with Carbon PFC’s, a proposed second high power (up to ~40MW) D-T campaign (DTE2) in the current Be/W vessel will address essential operational, technical, diagnostics and scientific issues in support of ITER. These experiments are proposed to minimize the risk…
PublishedGiacomelli L Conroy S Belli F Gorini G Horton L Joffrin E Lerche E Murari A Popovichev S Riva M Syme B JET EFDA Contributors
The Joint European Toras (JET, Culham, UK) is the largest tokamak in the world. It is devoted to nuclear fusion experiments of magnetic confined Deuterium (D) or Deuterium-Tritium (DT) plasmas. JET has been upgraded over the years and recently it has also become a test facility of the components designed for ITER, the next step fusion machine under…
PublishedK. K. Kirov Yu. Baranov E. Barbato M. Brix G. Corrigan A. Ekedahl M. Goniche J. Mailloux V. Petrzilka F. Rimini M. Stamp JET EFDA Contributors
An overview of the recent results of Lower Hybrid (LH) experiments at JET with the ITER-like wall (ILW) is presented. Topics relevant to LH wave coupling are addressed as well as issues related to ILW and LH system protections. LH wave coupling was studied in conditions determined by ILW recycling and operational constraints. It was concluded that …
PublishedA.-L. Campergue P. Jacquet V. Bobkov D. Milanesio I. Monakhov L. Colas G. Arnoux M. Brix A. Sirinelli JET-EFDA Contributors
When using Ion Cyclotron Range of Frequency (ICRF) heating, enhanced power deposition on Plasma-Facing Components (PFCs) close to the antennas can occur. Experiments have recently been carried out on JET with the new ITER-Like-Wall (ILW) to characterize the heat fluxes on the protection of the JET ICRF antennas, using Infra-Red (IR) thermography me…
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