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TY - UNPB AU - Li, J.B. AU - Guo, J.W. AU - Li, L. B. AU - Lu, W. AU - Sun, L.T. AU - Zhang, X.Z. AU - Zhao, H.W. ED - Schaa, Volker RW ED - Pisciotta, Pietro TI - Bremsstrahlung Measurements with SECRAL II Ion Source 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 - To investigate the hot electrons in highly charged electron cyclotron resonance (ECR) plasma, the bremsstrahlung spectra for X-rays between 10 and 300 keV were measured from SECRAL- II, a third-generation ECRIS at the Institute of Modern Physics. We focused on how the external source parameters, especially the magnetic configuration affect the axial bremsstrahlung and the resulting spectral temperature Ts. The experimental results have shown that Ts appears to be dependent solely on the minimum magnetic field Bmin rather than (Bmin/BECR) and the microwave frequency '. In addition, this investigation has shown that Ts is not sensitive to HV, bias and gas pressure, which implies that a more careful consideration into the heating mechanism of ECRIS is needed. PB - JACoW Publishing CP - Geneva, Switzerland ER -