Fig. 1. Schematic diagram of experimental setup.

Fig. 2. SF₆ plasma spectrum under femtosecond laser-guided high-voltage discharge.

Fig. 3. SF₆ plasma time-resolved spectroscopy.

Fig. 4. Time decay life curves of SF₆ plasma: (a) S III 409.91 nm; (b) F I 685.60 nm.

Fig. 5. Boltzmann plot with a delay time of 3630 ns.

Fig. 6. Time-resolved electron temperature of SF₆ plasma.

Fig. 7. Time-resolved electron density of SF₆ plasma.