Jin-Fang Wu, Zhao-Quan Chen, Ming Zhang, Huang Zhang, San-Yang Zhang, De-Ren Feng, Yu-Ming Zhou. Measurement of time-varying electron density of air spark shock wave plasma jet by the method of microwave Rayleigh scattering [J]. Acta Physica Sinica, 2020, 69(7): 075202-1
- Acta Physica Sinica
- Vol. 69, Issue 7, 075202-1 (2020)
Fig. 1. Plasma jet generated by atmospheric pressure air spark discharge: (a) Structure diagram of atmospheric pressure air spark discharge device; (b) installation photo of spark discharge device; (c) photo of air spark shock-wave plasma jet.
Fig. 2. Spark discharge voltage waveform.
Fig. 3. Microwave Rayleigh scattering device: (a) Experimental schematic diagram; (b) photo of experimental device.
Fig. 4. Calibration on a constant of microwave Rayleigh scattering device.
Fig. 5. Scattering signal measured by microwave Rayleigh scattering device.
Fig. 6. Optical images of air plasma jet.
Fig. 7. The radius r (t ) and length l (t ) of air plasma shock-wave jet.
Fig. 8. Time-varying electron density of plasma jet with the different equivalent scales: (a) r = 1.2 mm, l = 10 mm; (b) r = 1.2 mm, l = l (t ); (c) r = r (t ), l = 10 mm; (d) r = r (t ), l = l (t ).
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