Chinese Optics, Volume. 17, Issue 5, 1175(2024)
Radial structure and optical radiation characteristics of the cloud-ground lightning channel
Fig. 1. Last image of the stepped leader channel and the two successive images of the first return stroke channel. (a) −0.125 ms; (b) 0 ms; (c) 0.125 ms
Fig. 2. Gray value distribution of the different sample points along the radial channel
Fig. 3. Original spectrogram of the first return stroke at different times. (a) −0.125 ms; (b) 0 ms; (c) 0.125 ms
Fig. 4. Spectra of 4 sample points on the first return stroke channel at 0 and 0.125 ms, respectively
Fig. 5. Channel images of the first return stroke and the third subsequent return stroke
Fig. 6. Original spectrogram of the third subsequent return stroke at different times. (a) 87.013 ms; (b) 87.138 ms; (c) 87.263 ms
Fig. 7. Spectra of 4 sample points of the third subsequent return stroke at 87.138 ms
Table 1. Spectral line wavelengthes, excitation energies and transition probabilities observed in the first return stroke
View tableView in ArticleTable 1. Spectral line wavelengthes, excitation energies and transition probabilities observed in the first return stroke
波长 (nm) 激发能 (eV) 跃迁几率 (×108 s−1) NII 444.7 23.196 1.12 NII 463.0 21.159 0.748 NII 500.5 23.141 1.14 NII 568.0 20.665 0.496 NII 594.2 23.239 0.547 Hα 656.3 12.087 0.441 OI 715.6 14.460 0.505 NI 746.8 11.995 0.196 OI 777.4 10.740 0.369 OI 794.7 14.100 0.373 NI 821.6 11.844 0.226 OI 844.6 10.988 0.322 NI 868.0 11.763 0.253
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Guo-rong LIU, Yan-yan DAI, Wei-jun ZHU, Run-tong CHU, Ping YUAN, Dui-xiong SUN, Yun-yun MA. Radial structure and optical radiation characteristics of the cloud-ground lightning channel[J]. Chinese Optics, 2024, 17(5): 1175
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Received: Jan. 17, 2024
Accepted: Apr. 15, 2024
Published Online: Dec. 31, 2024
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