The effects of cathode electrodeposited polymer film on the long vacuum gap breakdownYu Zhang, Jiancang Su, Xudong Qiu, Rui Li, Liang Zhao, Binxiong Yu, Jie Cheng, Bo Zeng and Xiudong XuEur. Phys. J. Appl. Phys., 81 2 (2018) 21301DOI: https://doi.org/10.1051/epjap/2018170306