<p>Based on the collisional–radiative model, the energy levels, transition rates, and collision excitation rate coefficients of N II ions were calculated by implementing the Flexible Atomic Code. The line intensity of characteristic spectral lines for N II ions was simulated, which shows that the variations of electron temperature and electron density can affect the simulation of line intensity. In addition, the plasma spectra for an artificially triggered lightning, derived from Guangdong, China, were adopted to be simulated. It is found that when the simulated spectrum is well matched with the experimental one, its plasma environment becomes as 32,000 K and 10<InlineEquation ID="IEq1"> <EquationSource Format="TEX">$^{17}$</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mn>17</mn> </mmultiscripts> </math></EquationSource> </InlineEquation> cm<InlineEquation ID="IEq2"> <EquationSource Format="TEX">$^{-3}$</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mrow> <mo>-</mo> <mn>3</mn> </mrow> </mmultiscripts> </math></EquationSource> </InlineEquation>, which is called Visual-Spectra-Matching (VSM) method. Moreover, through adopting the Multi-Spectra-Ratio-Matching (MSRM) method, the results are diagnosed as 32,000 ± 103 K and (1.38 ± 0.6) <InlineEquation ID="IEq3"> <EquationSource Format="TEX">$\times $</EquationSource> <EquationSource Format="MATHML"><math> <mo>×</mo> </math></EquationSource> </InlineEquation> 10<InlineEquation ID="IEq4"> <EquationSource Format="TEX">$^{17}$</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mn>17</mn> </mmultiscripts> </math></EquationSource> </InlineEquation> cm<InlineEquation ID="IEq5"> <EquationSource Format="TEX">$^{-3}$</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mrow> <mo>-</mo> <mn>3</mn> </mrow> </mmultiscripts> </math></EquationSource> </InlineEquation>. Good agreements can be found in the comparisons among VSM, MSRM, and other measurements.</p>

Parameter diagnosis for the plasma of artificially triggered lightning based on collisional–radiative model

期刊论文
发表日期：

2026年5月27日

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Yiqi Wang,
Xiaozhi Shen,
Huaming Zhang,
Qi Qi,
Cuicui Sang,
Yongliang Zhang,
Zhi Li

摘要

Based on the collisional–radiative model, the energy levels, transition rates, and collision excitation rate coefficients of N II ions were calculated by implementing the Flexible Atomic Code. The line intensity of characteristic spectral lines for N II ions was simulated, which shows that the variations of electron temperature and electron density can affect the simulation of line intensity. In addition, the plasma spectra for an artificially triggered lightning, derived from Guangdong, China, were adopted to be simulated. It is found that when the simulated spectrum is well matched with the experimental one, its plasma environment becomes as 32,000 K and 10 $^{17}$ $^{17}$ cm $^{-3}$ $^{- 3}$ , which is called Visual-Spectra-Matching (VSM) method. Moreover, through adopting the Multi-Spectra-Ratio-Matching (MSRM) method, the results are diagnosed as 32,000 ± 103 K and (1.38 ± 0.6) $\times $ $\times$ 10 $^{17}$ $^{17}$ cm $^{-3}$ $^{- 3}$ . Good agreements can be found in the comparisons among VSM, MSRM, and other measurements.