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More details can be found in this publication : " Status Report on Metallic Beam Production at GANIL/SPIRAL 2 ", 22th ECRIS (Busan 2016).
Spectrum obtained with ECR4M and optimized on 181Ta24+ (5.5 μA). RF power: 371 W (22 W reflected), 19 kV/2.4 mA, sputtering gaz Ar and buffer gaz O2: 2E-5 mbar at injection, 2E-7 mbar at extraction, sputtering voltage: -1200 V/1.4 mA, sputtering electrode position: +16 mm inside the plasma chamber, coils 895A/755A. Transport efficiency up to the faraday cup: ~50%.
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