This title appears in the Scientific Report :
2020
Please use the identifier:
http://hdl.handle.net/2128/24872 in citations.
Please use the identifier: http://dx.doi.org/10.1088/1402-4896/ab5753 in citations.
Peculiarity of highly radiating multi-impurity seeded H -mode plasmas on JET with ITER-like wall
Peculiarity of highly radiating multi-impurity seeded H -mode plasmas on JET with ITER-like wall
On JET with fully metallic first wall, highly radiative conditions with N2, Ne and Ar as well as their mixture as radiators are approached in high density H-mode plasmas. The confinement increases from H 98(y,2) = 0.65 in unseeded pulses with γ rad ~ 30% to a value of H 98(y,2) = 0.75 at γ rad ~ 50%...
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Personal Name(s): | Huber, A. (Corresponding author) |
---|---|
Wischmeier, M. / Bernert, M. / Wiesen, S. / Glöggler, S. / Aleiferis, S. / Brezinsek, S. / Calabro, G. / Carvalho, P. / Huber, V. / Sergienko, G. / Solano, E. R. / Giroud, C. / Groth, M. / Jachmich, S. / Linsmeier, Ch / Matthews, G. F. / Meigs, A. G. / Mertens, Ph / Sertoli, M. / Silburn, S. / Telesca, G. | |
Contributing Institute: |
Plasmaphysik; IEK-4 |
Published in: | Physica scripta, T171 (2020) S. 014055 - |
Imprint: |
Stockholm
The Royal Swedish Academy of Sciences
2020
|
DOI: |
10.1088/1402-4896/ab5753 |
Document Type: |
Journal Article |
Research Program: |
Plasma-Wall-Interaction |
Link: |
Published on 2020-03-16. Available in OpenAccess from 2021-03-16. Published on 2020-03-16. Available in OpenAccess from 2021-03-16. |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1088/1402-4896/ab5753 in citations.
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245 | |a Peculiarity of highly radiating multi-impurity seeded H -mode plasmas on JET with ITER-like wall | ||
260 | |a Stockholm |c 2020 |b The Royal Swedish Academy of Sciences | ||
520 | |a On JET with fully metallic first wall, highly radiative conditions with N2, Ne and Ar as well as their mixture as radiators are approached in high density H-mode plasmas. The confinement increases from H 98(y,2) = 0.65 in unseeded pulses with γ rad ~ 30% to a value of H 98(y,2) = 0.75 at γ rad ~ 50% with N2 injection. A degradation of the pedestal profile is compensated by steeper core n e and T e profiles. Further increase of γ rad with increase of the N2 seeding rate leads to a moderate confinement degradation which can be avoided by applying of combined impurity seeding. The enhancement of the plasma performance for the radiation fractions beyond 55% with the maximum value of H 98(y,2) = 0.78 is reached with combined N2 + Ne and N2 + Ar impurity injections. The observed intense, strongly localized radiation at the X-point inside the confined plasma in the scenarios with the highest radiated power fraction is interlinked to complete divertor detachment. In the JET-ILW, the X-point radiation is stable, reproducible and reversible. | ||
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