High Power Laser Science and Engineering, 2018, 6 (2): 02000e31, Published Online: Jul. 4, 2018
Measurement and analysis of K-shell lines of silicon ions in laser plasmas Download: 549次
Abstract
We present laboratory measurement and theoretical analysis of silicon K-shell lines in plasmas produced by Shenguang II laser facility, and discuss the application of line ratios to diagnose the electron density and temperature of laser plasmas. Two types of shots were carried out to interpret silicon plasma spectra under two conditions, and the spectra from 6.6 ? to 6.85 ? were measured. The radiative-collisional code based on the flexible atomic code (RCF) is used to identify the lines, and it also well simulates the experimental spectra. Satellite lines, which are populated by dielectron capture and large radiative decay rate, influence the spectrum profile significantly. Because of the blending of lines, the traditional $G$ value and $R$ value are not applicable in diagnosing electron temperature and density of plasma. We take the contribution of satellite lines into the calculation of line ratios of He-$\unicode[STIX]{x1D6FC}$ lines, and discuss their relations with the electron temperature and density.
Bo Han, Feilu Wang, Jiayong Zhong, Guiyun Liang, Huigang Wei, Dawei Yuan, Baojun Zhu, Fang Li, Chang Liu, Yanfei Li, Jiarui Zhao, Zhe Zhang, Chen Wang, Jun Xiong, Guo Jia, Neng Hua, Jianqiang Zhu, Yutong Li, Gang Zhao, Jie Zhang. Measurement and analysis of K-shell lines of silicon ions in laser plasmas[J]. High Power Laser Science and Engineering, 2018, 6(2): 02000e31.