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TY - CONF AU - Benitez, J.Y. AU - Lyneis, C.M. AU - Phair, L. AU - Todd, D.S. AU - Xie, D. ED - Schaa, Volker RW TI - Recent Bremsstrahlung Measurements from the Superconducting Electron Cyclotron Resonance Ion Source 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 - Axial bremsstrahlung from the superconducting Electron Cyclotron Resonance ion source VENUS have been systematically measured as a function of RF heating frequency, and the axial and radial field strengths. The work focuses on bremsstrahlung with energies greater than 10 keV to extract the spectral temperature Ts. The three axial coils and the radial coils in the superconducting VENUS can all be set independently and have a large dynamic range, which makes it possible to decouple Bmin and Bgrad and study their effects on the bremsstrahlung independently. With typical pressure and RF power levels, the measurements show that Ts depends approximately linearly on Bmin and is not correlated with the ∇BECR, the magnetic field mirror ratios or the RF frequency. These results are important for the next generation of ECR ion sources, which are designed to operate at frequencies above 40 GHz and significantly higher magnetic fields where bremsstrahlung is expected to cause a significant cryogenic heat load and increase the radiation shielding requirements. PB - JACoW CP - Geneva, Switzerland SP - 23 EP - 29 KW - ion KW - ECR KW - extraction KW - electron KW - detector DA - 2016/10 PY - 2016 SN - 978-3-95450-186-1 DO - 10.18429/JACoW-ECRIS2016-MOCO04 UR - http://jacow.org/ecris2016/papers/moco04.pdf ER -