Abstract
Propagation of shock waves in soda lime glass, which is a transparent material, has been studied using the optical shadowgraphy technique. The time-resolved shock velocity information has been obtained (1) in single shot, using the chirped pulse shadowgraphy technique, with a temporal resolution of tens of picoseconds and (2) in multiple shots, using conventional snapshot approach, with a second harmonic probe pulse. Transient shock velocities of (5–7) × 106 cm/s have been obtained. The scaling of the shock velocity with intensity in the 2 × 1013–1014 W/cm2 range has been obtained. The shock velocity is observed to scale with laser intensity as I 0.38. The present experiments also show the presence of ionization tracks, generated probably due to X-ray hotspots from small-scale filamentation instabilities. The results and various issues involved in these experiments are discussed.
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Acknowledgements
The authors would like to acknowledge the help of A P Kulkarni, S Jain, D Daiya and A K Sharma on the laser side, and M S Ansari, C P Navathe, N Sreedhar, R Singh and other electronics team members for the electronics support during the experiments. The prompt help from R P Kushwaha in making the target rotator is greatly acknowledged. The enthusiastic participation of M Goswami, M. Tech Project Trainee from School of Physics, DAVV, Indore is greatly acknowledged.
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S R PRASAD, Y.B., BARNWAL, S., NAIK, P.A. et al. Shock wave propagation in soda lime glass using optical shadowgraphy. Pramana - J Phys 87, 9 (2016). https://doi.org/10.1007/s12043-016-1212-z
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DOI: https://doi.org/10.1007/s12043-016-1212-z