Li, L. Chu, Q.W. Guo, H. He, Y. Xiong, P.R. Yang, Z.Q. You, Z.M. Zhang, B. Zhang, S.H. Zhu, X. JACoW Geneva, Switzerland 978-3-95450-191-5 10.18429/JACoW-SRF2017-TUPB112 English 660-662 TUPB112 ion cavity cathode controls SRF Contribution to a conference proceedings 2018 2018-01 https://doi.org/10.18429/JACoW-SRF2017-TUPB112 http://jacow.org/srf2017/papers/tupb112.pdf The first SRF cavity electropolishing system of China has been built by IMPCAS. We used two type of cathodes in different process parameters to test the typical Voltage-Current Density curves of 1.3GHz one-cell SRF cavity.