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UKAEA-CCFE-PR(26)4332026
The 2023 JET deuterium–tritium (D–T) experimental campaign (DTE3) achieved record fusion energy output (69 MJ), providing a unique 14.1 MeV neutron environment for irradiation studies. A range of ITER material samples were exposed in a Long-Term Irradiation Station (LTIS) within the JET nuclear environment to neutron fluxes up to 2 × 10¹³ n/…
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UKAEA-CCFE-PR(26)4302026
In the paper we present validated integrated modelling of JET experiments in which fusion performance is driven by reactions between fast ions and intrinsically present metal wall impurities. A steady-state L-mode plasma with dominant proton-beryllium fusion and neutron yields of up to ≈ 6 x 1013 s-1 is developed in He and D…
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UKAEA-CCFE-PR(26)4722025
Alfven eigenmodes driven by positive energy gradients in the alpha particle distribution have been observed in JET deuterium-tritium hybrid JET pulses heated only by neutral beam injection. Coherent low frequency magnetic fluctuations were detected in D-T pulses, but were absent in pure D reference pulses, indicating that the modes were destabil…
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UKAEA-CCFE-PR(26)4152025
An understanding of the occurrence of opacity is important for modelling the power exhaust of magnetic confinement fusion plasmas. The absorption and reemission of radiation alters the magnitude and distribution of radiation within the divertor of the fusion machines, the plasma volume wi…
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UKAEA-CCFE-PR(25)4052025
The ability to capture the isotope mass scaling of core confinement seen in experiment is validated with JETTO-TGLF for low power JET-ILW discharges across H, D and T. The cases analysed include Ohmic discharges spanning the linear and saturated Ohmic confinement regimes as well as a trio of L-modes. The TGLF saturation rules SAT1-SAT3 are seen to …
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UKAEA-CCFE-PR(25)4032025
In its lifetime of around 40 years of scientific operations, JET has performed three full-scale DT experimental campaigns: one in 1997 (DTE1) and two more in a relatively quick succession in 2021 (DTE2) and 2023 (DTE3). One of the goals of these campaigns, apart from studying variety of physics effect relevant to DT plasmas, was demonstration of fu…
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UKAEA-CCFE-CP(25)242025
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UKAEA-CCFE-PR(25)3832025
Three tungsten Langmuir probes retrieved from the JET tokamak with the ITER-Like Wall(JET-ILW) from the bulk tungsten Tile 5 have been studied. Nano-indentation, microscopy, ionbeam analysis (IBA), and X-ray diffraction were used to assess changes in their mechanicalproperties, microstructure, and phase composition. Four region…
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UKAEA-CCFE-CP(25)232025
The feasibility of laser-induced breakdown spectroscopy (LIBS) for measuring fuel retention was demonstrated for the first time in a tokamak operating with tritium using a remotely controlled in situ application in JET. In JET and future fusion reactors such as ITER and DEMO, thick co-deposited layers will be formed at the inner wall during exte…
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UKAEA-CCFE-PR(25)3802025
This Roadmap article addresses the critical and multifaceted challenge of plasma-facing component (PFC) damage caused by runaway electrons (REs) in tokamaks, a phenomenon that poses a significant threat to the viability and longevity of future fusion reactors such as ITER and DEMO. The dramatically increased RE production expected in future high-cu…
Showing 1 - 10 of 510 UKAEA Paper Results