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(ITER/3) Divertor Design and its Integration into the ITER-FEAT Machine

G. Janeschitz¹⁾, A. Antipenkov¹⁾, G. Federici¹⁾, C. Ibbott¹⁾, A. S. Kukushkin¹⁾, P. Ladd¹⁾, E. Martin¹⁾, R. Tivey^1)
 
1) ITER Joint Central Team, Boltzmannstrasse 2, 85748 Garching, Germany

Abstract.  The physics of the edge and divertor plasma is strongly coupled with the divertor and the fuel cycle design. Due to the limited space available the design as well as the remote maintenance approach for the ITER divertor are highly optimized to allow maximum space for the divertor plasma. Several auxiliary systems (e.g. in vessel viewing, glow discharge electrodes...) as well as a part of the pumping and fuelling system have to be integrated together with the divertor into the lower level of the ITER machine. Two main options exist for the choice of the plasma-facing material in the divertor, i.e. W and CFC. Based on already existing R&D results one can be optimistic that the material choice will be mainly based on physics considerations and material issues (e.g. C-T co-deposition). The requirements for the ITER fuel cycle arise from plasma physics as well as from the envisaged operation scenarios. Due to the complex dynamic relationship of the fuel cycle subsystems among themselves and with the plasma, codes are employed for their optimization. This paper elaborates these interacting issues and gives the latest design status.

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