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TY - CONF AU - Maimone, F. AU - Endermann, M. AU - Lang, R. AU - Mäder, J. AU - Patchakui, P.T. AU - Spädtke, P. AU - Tinschert, K. ED - Schaa, Volker RW TI - Versatile High Power Microwave System for Frequency Tuning of the CAPRICE ECRIS J2 - Proc. of ECRIS2016, Busan, Korea, August 28 - September 1, 2016 C1 - Busan, Korea T2 - International Workshop on ECR Ion Sources T3 - 22 LA - english AB - In the last years it was demonstrated that the variation of the microwave frequency generating the plasma inside ECR Ion Sources (ECRISs) allows to enhance the extracted current of highly charged ions both for gaseous and for metallic elements. In order to use this technique for the performance improvement of the CAPRICE-type ECRIS installed at the High Charge State Injector (HLI) of GSI, the microwave system has been modified. The new arrangement includes - besides the existing Klystron high power amplifier (HPA; max. 2 kW at 14.5 GHz) - two combined Traveling Wave Tube Amplifiers (TWTA) covering a bandwidth of 12.75-14.5 GHz, providing 750 W output power each, which are driven by one or two synthesizer tuners. The new system has been used during the routine operation of the ECRIS for production of different ion beams to be injected into the RFQ of the HLI. A detailed description of the main components of the new microwave system is presented, and the achieved characteristics of ion beam production using different microwave frequencies are described. PB - JACoW CP - Geneva, Switzerland SP - 115 EP - 117 KW - ion KW - ECR KW - ECRIS KW - operation KW - klystron DA - 2016/10 PY - 2016 SN - 978-3-95450-186-1 DO - 10.18429/JACoW-ECRIS2016-WEPP22 UR - http://jacow.org/ecris2016/papers/wepp22.pdf ER -