Development of JET hybrid scenario plasmas in deuterium and deuterium–tritium for impurity screening investigations

Abstract The low density and high temperature at the pedestal in hybrid scenarios on JET provide a unique test of the neo-classical screening in the periphery of the plasma that has previously been observed on JET in such plasmas. Hybrid scenario plasmas have been further developed to aid in the study of temperature gradient screening of high- Z impurities from the core of the plasma via plasma current, toroidal field, gas fuelling, density and isotope variations. The steps required to adapt the pulses from deuterium to deuterium–tritium are discussed and provide some guidance for future experiments that may operate in deuterium–tritium. The optimisation of the scenario allowed for improved bolometry data compared to the Deuterium Tritium Experiment 2 campaign on JET, hence this work provides vital evidence of impurity screening in a high fusion power, deuterium–tritium plasma.

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Publication Details

Journal
Plasma Physics and Controlled Fusion
Published
2026-03-31
DOI
https://doi.org/10.1088/1361-6587/ae59ff
Primary Topic
Magnetic confinement fusion research
Type
article
Field-Weighted Citation Impact
0.00

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article

Development of JET hybrid scenario plasmas in deuterium and deuterium–tritium for impurity screening investigations

J.M. Fontdecaba, A. Kappatou, A. Meigs, S. Silburn et al.
Plasma Physics and Controlled Fusion
Magnetic confinement fusion research
article

Development of JET hybrid scenario plasmas in deuterium and deuterium–tritium for impurity screening investigations

J.M. Fontdecaba, A. Kappatou, A. Meigs, S. Silburn, G. Pucella, L. Frassinetti, D. Keeling, H.J. Sun, M. Baruzzo, C. Olde, Carine Giroud, S. Menmuir, K. Kirov, E. Lerche, Ivo Samuel Carvalho, Pedro Carvalho, Anthony Robert Field, Evie Litherland-Smith, Clive D Challis, M. Maslov, D. King, Ephrem Delabie, Joerg Hobirk
article en

Abstract

Abstract The low density and high temperature at the pedestal in hybrid scenarios on JET provide a unique test of the neo-classical screening in the periphery of the plasma that has previously been observed on JET in such plasmas. Hybrid scenario plasmas have been further developed to aid in the study of temperature gradient screening of high- Z impurities from the core of the plasma via plasma current, toroidal field, gas fuelling, density and isotope variations. The steps required to adapt the pulses from deuterium to deuterium–tritium are discussed and provide some guidance for future experiments that may operate in deuterium–tritium. The optimisation of the scenario allowed for improved bolometry data compared to the Deuterium Tritium Experiment 2 campaign on JET, hence this work provides vital evidence of impurity screening in a high fusion power, deuterium–tritium plasma.

Plasma Physics and Controlled FusionVol. 68(4)
ITER (FR), Oak Ridge National Laboratory (US), Culham Science Centre (GB), Max Planck Institute for Plasma Physics (DE), Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati (IT), Consorzio per la Ricerca Sanitaria (IT), Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (ES), United Kingdom Atomic Energy Authority (GB), KTH Royal Institute of Technology (SE)
EUROfusion
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Magnetic confinement fusion research
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