Wu Jin-Fang, Chen Zhao-Quan, Zhang Ming, Zhang Huang, Zhang San-Yang, Feng De-Ren, Zhou Yu-Ming. Measurement of time-varying electron density of air spark shock wave plasma jet by the method of microwave Rayleigh scatteringJ. Acta Physica Sinica, 2020, 69(7): 075202. DOI: 10.7498/aps.69.20191909