The radiated power limit in impurity seeded JET-ILW plasmas
The total radiated fraction is examined in high density H-mode plasmas (Greenwald fraction of about 85 %) in JET by the variation of the auxiliary heating power of Pheat = 14 MW-29 MW. An achieved radiation fraction of about 75 % at most has been observed in JET-ILW, which is less than the highest a...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-10-01
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| Series: | Nuclear Materials and Energy |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352179122001806 |
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| author | A. Huber M. Wischmeier S. Wiesen M. Bernert A.V. Chankin S. Aleiferis S. Brezinsek V. Huber G. Sergienko C. Giroud M. Groth S. Jachmich Ch. Linsmeier B. Lomanowski C. Lowry G.F. Matthews A.G. Meigs Ph. Mertens S. Silburn G. Telesca |
| author_facet | A. Huber M. Wischmeier S. Wiesen M. Bernert A.V. Chankin S. Aleiferis S. Brezinsek V. Huber G. Sergienko C. Giroud M. Groth S. Jachmich Ch. Linsmeier B. Lomanowski C. Lowry G.F. Matthews A.G. Meigs Ph. Mertens S. Silburn G. Telesca |
| author_sort | A. Huber |
| collection | DOAJ |
| description | The total radiated fraction is examined in high density H-mode plasmas (Greenwald fraction of about 85 %) in JET by the variation of the auxiliary heating power of Pheat = 14 MW-29 MW. An achieved radiation fraction of about 75 % at most has been observed in JET-ILW, which is less than the highest achievable (≈90 %) fraction in JET-C during the high radiative power scenarios with N2 seeding. It is shown that the maximal achievable total radiation fraction averaged over ELM cycles has a strong dependence on the radiation efficiency of the ELM energy, θrad: γrad,totalmax=1-fELM×ΔWELMPheat1-θrad. About 50 % and 16 % of the ELM induced diamagnetic energy drop (ΔWELM) radiates during the ELM in JET-C and JET-ILW, respectively, which corresponds to the maximum total radiated powers of γrad,JET-Cmax=0.87 and γrad,JET-ILWmax=0.77. These values of the maximum of the radiative power fractions are in good agreement with γradmax experimentally observed in JET-C (90 %) and JET-ILW (75 %). |
| first_indexed | 2024-04-11T08:07:50Z |
| format | Article |
| id | doaj.art-213f3a80a2d5494a9f3006f149cf305a |
| institution | Directory Open Access Journal |
| issn | 2352-1791 |
| language | English |
| last_indexed | 2024-04-11T08:07:50Z |
| publishDate | 2022-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Materials and Energy |
| spelling | doaj.art-213f3a80a2d5494a9f3006f149cf305a2022-12-22T04:35:28ZengElsevierNuclear Materials and Energy2352-17912022-10-0133101299The radiated power limit in impurity seeded JET-ILW plasmasA. Huber0M. Wischmeier1S. Wiesen2M. Bernert3A.V. Chankin4S. Aleiferis5S. Brezinsek6V. Huber7G. Sergienko8C. Giroud9M. Groth10S. Jachmich11Ch. Linsmeier12B. Lomanowski13C. Lowry14G.F. Matthews15A.G. Meigs16Ph. Mertens17S. Silburn18G. Telesca19Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, 52425 Jülich, Germany; Corresponding author.Max-Planck-Institut für Plasmaphysik, Boltzmannstraße, 2, D-85748 Garching, GermanyForschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, 52425 Jülich, GermanyMax-Planck-Institut für Plasmaphysik, Boltzmannstraße, 2, D-85748 Garching, GermanyMax-Planck-Institut für Plasmaphysik, Boltzmannstraße, 2, D-85748 Garching, GermanyNCSR ‘Demokritos’, 153 10, Agia Paraskevi Attikis, GreeceForschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, 52425 Jülich, GermanyForschungszentrum Jülich GmbH, Supercomputing Centre, 52425 Jülich, GermanyForschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, 52425 Jülich, GermanyCCFE, Culham Science Centre, Abingdon OX14 3DB, UKAalto University, Association EURATOM-Tekes, P.O. Box 4100, 02015 Espoo, FinlandLaboratory for Plasma Physics, ERM/KMS, B-1000 Brussels, BelgiumForschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, 52425 Jülich, GermanyOak Ridge National Laboratory, Oak Ridge, TN 37831, USACCFE, Culham Science Centre, Abingdon OX14 3DB, UKCCFE, Culham Science Centre, Abingdon OX14 3DB, UKCCFE, Culham Science Centre, Abingdon OX14 3DB, UKForschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, 52425 Jülich, GermanyCCFE, Culham Science Centre, Abingdon OX14 3DB, UKInstitute of Plasma Physics and Laser Microfusion, Warsaw, PolandThe total radiated fraction is examined in high density H-mode plasmas (Greenwald fraction of about 85 %) in JET by the variation of the auxiliary heating power of Pheat = 14 MW-29 MW. An achieved radiation fraction of about 75 % at most has been observed in JET-ILW, which is less than the highest achievable (≈90 %) fraction in JET-C during the high radiative power scenarios with N2 seeding. It is shown that the maximal achievable total radiation fraction averaged over ELM cycles has a strong dependence on the radiation efficiency of the ELM energy, θrad: γrad,totalmax=1-fELM×ΔWELMPheat1-θrad. About 50 % and 16 % of the ELM induced diamagnetic energy drop (ΔWELM) radiates during the ELM in JET-C and JET-ILW, respectively, which corresponds to the maximum total radiated powers of γrad,JET-Cmax=0.87 and γrad,JET-ILWmax=0.77. These values of the maximum of the radiative power fractions are in good agreement with γradmax experimentally observed in JET-C (90 %) and JET-ILW (75 %).http://www.sciencedirect.com/science/article/pii/S2352179122001806ImpurityImpurity seedingHigh radiation plasma scenariosJET-ILW |
| spellingShingle | A. Huber M. Wischmeier S. Wiesen M. Bernert A.V. Chankin S. Aleiferis S. Brezinsek V. Huber G. Sergienko C. Giroud M. Groth S. Jachmich Ch. Linsmeier B. Lomanowski C. Lowry G.F. Matthews A.G. Meigs Ph. Mertens S. Silburn G. Telesca The radiated power limit in impurity seeded JET-ILW plasmas Nuclear Materials and Energy Impurity Impurity seeding High radiation plasma scenarios JET-ILW |
| title | The radiated power limit in impurity seeded JET-ILW plasmas |
| title_full | The radiated power limit in impurity seeded JET-ILW plasmas |
| title_fullStr | The radiated power limit in impurity seeded JET-ILW plasmas |
| title_full_unstemmed | The radiated power limit in impurity seeded JET-ILW plasmas |
| title_short | The radiated power limit in impurity seeded JET-ILW plasmas |
| title_sort | radiated power limit in impurity seeded jet ilw plasmas |
| topic | Impurity Impurity seeding High radiation plasma scenarios JET-ILW |
| url | http://www.sciencedirect.com/science/article/pii/S2352179122001806 |
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