A 20 MW Lower Hybrid Current Drive system using an antenna based on the Passive-Active Multijunction (PAM) concept is envisaged on ITER. This paper gives an overview of the mechanical analysis, modeling and design carried out on two major elements of the antenna: the grill front face, and the RF feed-through or windows. The front face will have to withstand high heat and fast neutrons fluxes directly from the plasma. It will be actively cooled and present a beryllium coating upon ITER requirement. The RF window being a critical safety importance class component (SIC) because of its tritium confinement function, two of them will be put in series on each line to achieve a double barrier. A design of a water cooled 5 GHz CW RF “pillbox” window capable of sustaining 500 kW of transmitted power is proposed. Both studies allow to move forward, and focus on critical issues, such as manufacturing processes and R&D associated programs including tests of mock-ups.

Thermal and mechanical analysis of ITER-relevant LHCD antenna elements / Marfisi, L.; Goniche, M.; Hamlyn Harris, C.; Hillairet, J.; Artaud, J. F.; Bae, Y. S.; Belo, J.; Berger By, G.; Bernard, J. M.; Cara, P. h.; Cardinali, A.; Castaldo, C.; Ceccuzzi, S.; Cesario, R.; Decker, J.; Delpech, L.; Ekedahl, A.; Garcia, J.; Garibaldi, P.; Guilhem, D.; Hoang, G. T.; Jia, H.; Huang, Q. Y.; Imbeaux, F.; Kazarian, F.; Kim, S. H.; Lausenaz, Y.; Maggiora, Riccardo; Magne, R.; Meschino, S.; Milanesio, Daniele; Mirizzi, F.; Namkung, W.; Pajewski, L.; Panaccione, L.; Peysson, Y.; Saille, A.; Schettini, G.; Schneider, M.; Sharma, P. K.; Tuccillo, A. A.; Tudisco, O.; Vecchi, Giuseppe; Villari, R.; Vulliez, K.; Wu, Y.; Zeng, Q. .. - In: FUSION ENGINEERING AND DESIGN. - ISSN 0920-3796. - STAMPA. - 86:(2011), pp. 810-814. (Intervento presentato al convegno 26th Symposium of Fusion Technology (SOFT-26) tenutosi a Porto, Portugal nel 27 September - 1 October 2010) [10.1016/j.fusengdes.2011.01.025].

Thermal and mechanical analysis of ITER-relevant LHCD antenna elements

MAGGIORA, Riccardo;MILANESIO, DANIELE;VECCHI, Giuseppe;
2011

Abstract

A 20 MW Lower Hybrid Current Drive system using an antenna based on the Passive-Active Multijunction (PAM) concept is envisaged on ITER. This paper gives an overview of the mechanical analysis, modeling and design carried out on two major elements of the antenna: the grill front face, and the RF feed-through or windows. The front face will have to withstand high heat and fast neutrons fluxes directly from the plasma. It will be actively cooled and present a beryllium coating upon ITER requirement. The RF window being a critical safety importance class component (SIC) because of its tritium confinement function, two of them will be put in series on each line to achieve a double barrier. A design of a water cooled 5 GHz CW RF “pillbox” window capable of sustaining 500 kW of transmitted power is proposed. Both studies allow to move forward, and focus on critical issues, such as manufacturing processes and R&D associated programs including tests of mock-ups.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2445775
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