Long pulse laser driven shock wave loading for dynamic materials experiments

S. N. Luo, S. R. Greenfield, D. L. Paisley, R. P. Johnson, T. Shimada, D. D. Byler, E. N. Loomis, S. N. DiGiacomo, B. M. Patterson, K. J. McClellan, R. M. Dickerson, Pedro Peralta, A. C. Koskelo, D. L. Tonks

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We present two laser driven shock wave loading techniques utilizing long pulse lasers, laser-launched flyer plate and confined laser ablation, and their applications to shock physics. The full width at half maximum of the drive laser pulse ranges from 100 ns to 10 μs, and its energy, from 10 J to 1000 J. The drive pulse is smoothed with a holographic optical element to achieve spatial homogeneity in loading. We characterize the flyer plate during flight and dynamically loaded target with temporally and spatially resolved diagnostics. The long duration and high energy of the drive pulse allow for shockless acceleration of thick flyer plates with 8 mm diameter and 0.1-2 mm thickness. With transient imaging displacement interferometry and line-imaging velocimetry, we demonstrate that the planarity (bow and tilt) of the loading is within 2-7 mrad (with an average of 4±1 mrad), similar to that in conventional techniques including gas gun loading. Plasma heating of target is negligible in particular when a plasma shield is adopted. For flyer plate loading, supported shock waves can be achieved. Temporal shaping of the drive pulse in confined laser ablation enables flexible loading, e.g., quasi-isentropic, Taylor-wave, and off-Hugoniot loading. These dynamic loading techniques using long pulse lasers (0.1-10 μs) along with short pulse lasers (1-10 ns) can be an accurate, versatile and efficient complement to conventional shock wave loading for investigating such dynamic responses of materials as Hugoniot elastic limit, plasticity, spall, shock roughness, equation of state, phase transition, and metallurgical characteristics of shock-recovered samples, in a wide range of strain rates and pressures at meso- and macroscopic scales.

Original languageEnglish (US)
Title of host publicationHigh-Power Laser Ablation VII
DOIs
StatePublished - Sep 1 2008
EventHigh-Power Laser Ablation VII - Taos, NM, United States
Duration: Apr 20 2008Apr 24 2008

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7005
ISSN (Print)0277-786X

Other

OtherHigh-Power Laser Ablation VII
CountryUnited States
CityTaos, NM
Period4/20/084/24/08

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Keywords

  • Confined ablation
  • Flyer plate
  • Long pulse laser
  • Off-Hugoniot
  • Planarity
  • Quasi-isentropic
  • Shock waves

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Luo, S. N., Greenfield, S. R., Paisley, D. L., Johnson, R. P., Shimada, T., Byler, D. D., Loomis, E. N., DiGiacomo, S. N., Patterson, B. M., McClellan, K. J., Dickerson, R. M., Peralta, P., Koskelo, A. C., & Tonks, D. L. (2008). Long pulse laser driven shock wave loading for dynamic materials experiments. In High-Power Laser Ablation VII [700514] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7005). https://doi.org/10.1117/12.782206