Progress in reducing ICRF-specific impurity release in ASDEX upgrade and JET
| Autor: | E. Lerche, F. Durodié, V. Bobkov, I. H. Coffey, W. Zhang, E. Delabie, M. Baruzzo, A. Kallenbach, Qingxi Yang, L. Colas, R. Neu, I. Monakhov, C. Giroud, C. Christopher Klepper, F. Nave, Riccardo Maggiora, R. Dux, M. Goniche, D. Borodin, Helmut Faugel, Y.M. Wang, J.-M. Noterdaeme, I. Borodkina, A. Tuccilo, A. Herrmann, H. Fünfgelder, J. Hobirk, D. Aguiam, A. Czarnecka, S. Menmuir, Pierre Dumortier, J. Jacquot, D. Van Eester, A. Krivska, Matthew Reinke, O. Tudisco, R. Ochoukov, Th. Pütterich, Ph. Jacquet, Daniele Milanesio, S. Brezinsek |
|---|---|
| Přispěvatelé: | ASDEX Upgrade Team, Max Planck Institute for Plasma Physics, Max Planck Society, EUROfusion MST1 Team, JET Contributors, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Universidad de Sevilla. RNM138: Física Nuclear Aplicada |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Materials Science (miscellaneous) Radiation 7. Clean energy 01 natural sciences 010305 fluids & plasmas ILW Fusion plasma och rymdfysik ASDEX Upgrade Impurity A2 antenna 0103 physical sciences Limiter 3-strap 010306 general physics ICRF ILA JET RF sheath Sputtering Three-strap Nuclear Energy and Engineering Jet (fluid) Plasma lcsh:TK9001-9401 Fusion Plasma and Space Physics Computational physics Dipole lcsh:Nuclear engineering. Atomic power ddc:333.7 Atomic physics Antenna (radio) |
| Zdroj: | Nuclear materials and energy 12, 1194-1198 (2016). doi:10.1016/j.nme.2016.10.026 Nuclear Materials and Energy Nuclear Materials and Energy, Vol 12, Iss, Pp 1194-1198 (2017) idUS: Depósito de Investigación de la Universidad de Sevilla Universidad de Sevilla (US) idUS. Depósito de Investigación de la Universidad de Sevilla instname |
| DOI: | 10.1016/j.nme.2016.10.026 |
| Popis: | Use of new 3-strap ICRF antennas with all-tungsten (W) limiters in ASDEX Upgrade results in a reduction of the W sources at the antenna limiters and of the W content in the confined plasma by at least a factor of 2 compared to the W-limiter 2-strap antennas used in the past. The reduction is observed with a broad range of plasma shapes. In multiple locations of antenna frame, the limiter W source has a minimum when RF image currents are decreased by cancellation of the RF current contributions of the central and the outer straps. In JET with ITER-like wall, ITER-like antenna produces about 20% less of main chamber radiation and of W content compared to the old A2 antennas. However the effect of the A2 antennas on W content is scattered depending on which antennas are powered. Experiments in JET with trace nitrogen (N-2) injection show that a presence of active ICRF antenna close to the midplane injection valve has little effect on the core N content, both in dipole and in -90 degrees phasing. This indicates that the effect of ICRF on impurity transport across the scape-off-layer is small in JET compared to the dominant effect on impurity sources leading to increased impurity levels during ICRF operation. (C) 2016 The Authors. Published by Elsevier Ltd. For complete list of authors see http://dx.doi.org/10.1016/j.nme.2016.10.026 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|