The development characteristics of the discontinuous leader under the positive switching impulse with low rate of voltage risingYaoheng Xie, Yue Yishi, Huisheng Ye, Liu Yun, Yongheng Zhong and Xiangeng ZhaoEur. Phys. J. Appl. Phys., 83 2 (2018) 20802DOI: https://doi.org/10.1051/epjap/2018180103