S. A. Abrosimov, A. P. Bazhulin, A. P. Bol'shakov, V. I. Konov, I. K. Krasyuk, P. P. Pashinin, V. G. Ral'chenko, A. Yu. Semenov, D. N. Sovyk, I. A. Stuchebryukhov, V. E. Fortov, K. V. Khishchenko, A. A. Khomich, “Generation of negative pressures and spallation phenomena in diamond exposed to a picosecond laser pulse”, Kvantovaya Elektronika, 2014, Volume 44, Number 6,Pages <nobr>530

This article is cited in 14 papers

Extreme light fields and their applications

Generation of negative pressures and spallation phenomena in diamond exposed to a picosecond laser pulse

S. A. Abrosimov^a, A. P. Bazhulin^a, A. P. Bol'shakov^a, V. I. Konov^a, I. K. Krasyuk^a, P. P. Pashinin^a, V. G. Ral'chenko^a, A. Yu. Semenov^a, D. N. Sovyk^a, I. A. Stuchebryukhov^a, V. E. Fortov^b, K. V. Khishchenko^b, A. A. Khomich^a

^a A. M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow
^b Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow

Abstract: The spallation phenomena in poly- and single-crystal synthetic diamonds have been experimentally investigated. A shockwave impact on a target was implemented using a 70-ps laser pulse in the Kamerton-T facility. The ablation pressure of 0.66 TPa on the front target surface was formed by pulsed radiation of a neodymium phosphate glass laser (second harmonic λ = 0.527 mm, pulse energy 2.5 J) with an intensity as high as 2 × 10¹³ W cm^-2. The maximum diamond spall strength σ* ≈ 16.5 GPa is found to be 24% of the theoretical ultimate strength. Raman scattering data indicate that a small amount of crystalline diamond in the spallation region on the rear side of the target is graphitised.

Keywords: laser radiation, picosecond duration, ablation pressure, shock wave, negative pressure, spallation phenomenon, strain rate, ultimate strength, numerical simulation, synthetic diamond.

PACS: 79.20.Ds, 52.38.Mf, 81.05.Uw

Received: 03.03.2014
Revised: 12.03.2014