Fig. 1. Schematic of experimental device for telemetry LIBS system

Fig. 2. Variation of plasma spectra with wavelength and sample distance at different rail positions. (a) 4 mm; (b) 12 mm

Fig. 3. Intensity variation of element spectral line with sample distance at different rail positions

Fig. 4. Relative standard deviation variation of spectral line with sample distance at different guide positions. (a) 4 mm; (b) 12 mm

Fig. 5. Variation trend of spectral similarity at different sample distances

Fig. 6. Variation of sample position fluctuation tolerance with sample distance when similarity is 0.99

Fig. 7. Boltzmann plot of typical plasma temperatures

Fig. 8. Variation of plasma temperature with sample distance at different rail positions