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TY - CONF AU - Xie, D. AU - Benitez, J.Y. AU - Lu, W. AU - Lyneis, C.M. AU - Todd, D.S. ED - Schaa, Volker RW TI - Recent production of intense high charge ion beams with VENUS 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 - Several modifications have been made to the VENUS to enhance its performance at high microwave power and bring its performance closer to the levels predicted by scaling laws for 28 GHz operation. Two of these modifications improved its tolerance for operation at microwave power up to 10 kW. The cooling scheme on the plasma wall was improved to eliminate damage caused by localized electron heating. Similarly the extraction electrode was redesigned to transport away the electron heating more effectively. The third modification reduced the waveguide diameter, which launches the 28 GHz power into the plasma chamber. The source now runs efficiently at 10 kW of injected power with a more favorable magnetic field configuration. The production of intense highly charged ion beams with VENUS has been substantially enhanced. It has produced a number of record CW beams: 4.5 emA of O⁶⁺, 0.40 emA of Ar¹⁶⁺ and 0.06 emA of Ar¹⁷⁺ and for the first time the VENUS has produced more than 1 emA of Ar¹²⁺ and O⁷⁺. Source tuning is currently underway to explore the potential of VENUS and the overall improved source performance will be presented. PB - JACoW CP - Geneva, Switzerland SP - 142 EP - 146 KW - ion KW - plasma KW - ECR KW - GUI KW - extraction DA - 2016/10 PY - 2016 SN - 978-3-95450-186-1 DO - 10.18429/JACoW-ECRIS2016-THAO01 UR - http://jacow.org/ecris2016/papers/thao01.pdf ER -