Void Fraction Influence on CICCs Coupling Losses: Analysis of Experimental Results With MPAS Model

Modelling by analytical approach the coupling losses of CICCs used in tokamaks remains a challenge to be reliable. This is usually done using either CPU consuming numerical approaches or heuristic models such as MPAS now used for ITER. Experimental measurements of AC losses are performed at CEA using magnetization method on several type of JT-60SA TF samples with various void fractions (25%-36%). Influence of void fraction on coupling losses is hard to heuristically model yet. We choose to develop an experimental protocol in order to measure coupling losses in a range of frequency relevant to the domain of operation of fusion magnet. AC losses model as MPAS is confronted to our JOSEFA experimental data.Conclusion and lessons will be taken into account for future work.