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TY - CONF AU - Torrisi, G. AU - Castro, G. AU - Celona, L. AU - GalatÃ , A. AU - Gammino, S. AU - Mascali, D. AU - Mauro, G. AU - Mazzaglia, M. AU - Naselli, E. AU - Sorbello, G. ED - Schaa, Volker RW ED - Pisciotta, Pietro TI - Plasma Heating and Innovative Microwave Launching in ECRIS: Models and Experiments J2 - Proc. of ECRIS2018, Catania, Italy, 10-14 September 2018 C1 - Catania, Italy T2 - International Workshop on ECR Ion Sources T3 - 23 LA - english AB - Microwave-to-plasma coupling in ECRIS has been based on the classic scheme of waveguide-to-cylindrical plasma cavity matching. Optimization has been often obtained by empirical adjustments leading to an oversimplified model, obtaining however satisfying performances. In order to overcome the ECR-heating paradigm, on-purpose design of launchers' setup adequate diagnostics have to be developed. This paper describes three-dimensional numerical simulations and Radio Frequency (RF) measurements of wave propagation in the microwave-heated magnetized plasmas of ion sources. Moreover, driven by an increasing demand of high frequency ECR ion sources, innovative ideas for the geometry for both the plasma chamber and the related RF launching system - in a plasma microwave absorption-oriented scenario are presented. Finally, the design of optimized launchers enabling single-pass power deposition, not a'ected by cavity walls effects, are described. PB - JACoW Publishing CP - Geneva, Switzerland SP - 63 EP - 66 KW - plasma KW - ECR KW - electron KW - ion-source KW - experiment DA - 2019/01 PY - 2019 SN - 978-3-95450-196-0 DO - 10.18429/JACoW-ECRIS2018-TUB2 UR - http://jacow.org/ecris2018/papers/tub2.pdf ER -