Nearing final design of the ITER EC H&CD Upper Launcher
| Autor: | R. Bertizzolo, C.J.M. Heemskerk, Emanuele Poli, Gaetano Aiello, Alessandro Bruschi, Peter Spaeh, Dennis Ronden, Dieter Leichtle, Florian Ramseyer, J.F. Koning, Sabine Schreck, J. Pacheco, Lorenzo Figini, M. A. Henderson, Olivier Sauter, Theo Scherer, W. Kasparek, J.-D. Landis, Timothy Goodman, B. Weinhorst, Dirk Strauss, D. Farina, René Chavan, G. Saibene, Burkhard Plaum, N. Casal, Giovanni Grossetti, Carlo Sozzi, A. Vaccaro, Mario Gagliardi, Andreas Meier, S. Nowak, Matteo Vagnoni, A. Moro, P. Santos Silva, Paola Platania, A. Mas-Sanchez |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Aperture
Plasma heating 01 natural sciences 010305 fluids & plasmas law.invention law Gyrotron Shield ITER Electron cyclotron heating 0103 physical sciences Water cooling General Materials Science Upper launcher Aerospace engineering 010306 general physics Civil and Structural Engineering Physics business.industry Mechanical Engineering ECRH Electric power transmission Nuclear Energy and Engineering Extremely high frequency business Waveguide Beam (structure) |
| Zdroj: | Fusion Engineering and Design Fusion engineering and design 146 (2019): 23–26. doi:10.1016/j.fusengdes.2018.11.013 info:cnr-pdr/source/autori:Strauss D.; Aiello G.; Bertizzolo R.; Bruschi A.; Casal N.; Chavan R.; Farina D.; Figini L.; Gagliardi M.; Goodman T.P.; Grossetti G.; Heemskerk C.; Henderson M.A.; Kasparek W.; Koning J.; Landis J.-D.; Leichtle D.; Meier A.; Moro A.; Nowak S.; Pacheco J.; Platania P.; Plaum B.; Poli E.; Ramseyer F.; Ronden D.; Saibene G.; Mas-Sanchez A.; Santos Silva P.; Sauter O.; Scherer T.; Schreck S.; Sozzi C.; Spaeh P.; Vagnoni M.; Vaccaro A.; Weinhorst B./titolo:Nearing final design of the ITER EC H&CD Upper Launcher/doi:10.1016%2Fj.fusengdes.2018.11.013/rivista:Fusion engineering and design/anno:2019/pagina_da:23/pagina_a:26/intervallo_pagine:23–26/volume:146 Fusion Engineering and Design, 146, 23-26 |
| DOI: | 10.1016/j.fusengdes.2018.11.013 |
| Popis: | The ITER ECRH system consists of 24 gyrotrons with up to 24 MW installed millimeter wave heating power at 170 GHz, power supplies, control system, transmission lines, one Equatorial and the four Upper Launchers. With its high frequency and small beam focus the ECRH has the unique capability of driving locally current. While the Equatorial Launcher mainly acts for central heating and current profile shaping, the Upper Launchers aim on suppressing MHD instabilities, especially neoclassical tearing modes (NTM) triggering plasma disruptions. The Upper Launchers inject millimeter waves through a quasi-optical section consisting of three fixed and the front steering mirror set. The eight overlapping beams have focal points optimized for suppression of the q = 3/2 and q = 2/1 NTMs. Several project change requests required the redesign of the Upper Launchers and the connected ex-vessel system. This redesign includes a new boundary geometry of the launchers as well as a newly designed cooling system for the Blanket Shield Module (BSM), a modified flange of the BSM to the structural main frame and a refined optical design. Additionally shield blocks with integrated in-vessel waveguides were added and the closure plate with waveguide and supply line feedthroughs was adapted. Further changes, not all caused by PCRs, include newly designed ex-vessel waveguide components with a reduced aperture and redesigned ultra low-loss CVD diamond windows. Finally several components originally foreseen as off-the-shelf components have become part of the design scope. The new launcher design status is presented with selected results on numerical design validation. |
| Databáze: | OpenAIRE |
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