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| 001 | 891411 | ||
| 005 | 20240711114032.0 | ||
| 024 | 7 | _ | |a 10.1088/1402-4896/ab753f |2 doi |
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| 037 | _ | _ | |a FZJ-2021-01496 |
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| 100 | 1 | _ | |a Dittmar, T. |0 P:(DE-Juel1)158050 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Long pulse D 2 and N 2 seeded discharges on the upper actively cooled tungsten divertor of WEST |
| 260 | _ | _ | |a Stockholm |c 2020 |b The Royal Swedish Academy of Sciences |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a A series of L-mode discharges in upper single null configuration with more than 30 s duration were performed in the WEST tokamak with the strike line on actively cooled tungsten-coated divertor components. This series of discharges accumulated 20 min of plasma and a strike point fluence of $\approx 2\times {10}^{25}\,{{\rm{m}}}^{-2}$ in two days of operation in attached conditions. The discharges showed good density control, no tungsten accumulation and overall very benign thermal behaviour of the upper divertor. A subset of the discharges were seeded with nitrogen either in the divertor or midplane region to study plasma–wall interaction and associated ammonia formation in this weakly pumped scenario with all-tungsten plasma-facing components. While ammonia signals remained too weak for useful analysis, a strong dependence of nitrogen plasma penetration efficiency and residence time on the injection location was found. This hints towards a currently underestimated plasma-near nitrogen reservoir in these tokamak discharges in divertor configuration. |
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| 700 | 1 | _ | |a Fedorczak, N. |0 P:(DE-HGF)0 |b 7 |
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| 700 | 1 | _ | |a Gunn, J. |0 P:(DE-HGF)0 |b 9 |
| 700 | 1 | _ | |a Meyer, O. |0 P:(DE-HGF)0 |b 10 |
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| 773 | _ | _ | |a 10.1088/1402-4896/ab753f |g Vol. T171, p. 014074 - |0 PERI:(DE-600)1477351-X |p 014074 - |t Physica scripta |v T171 |y 2020 |x 1402-4896 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/891411/files/Dittmar_2020_Phys._Scr._2020_014074.pdf |y Restricted |
| 856 | 4 | _ | |y Published on 2020-06-24. Available in OpenAccess from 2021-06-24. |u https://juser.fz-juelich.de/record/891411/files/Postprint_Dittmar_134.pdf |
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